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10997888238 = 23467888199
BaseRepresentation
bin10100011111000011…
…00111010011101110
31001101110110121110000
422033201213103232
5140010424410423
65015150525130
7536352336051
oct121741472356
931343417400
1010997888238
114734026237
12216b2067a6
13106366839c
147648c0a98
154457c3843
hex28f8674ee

10997888238 has 20 divisors (see below), whose sum is σ = 24643416600. Its totient is φ = 3665962692.

The previous prime is 10997888233. The next prime is 10997888243. The reversal of 10997888238 is 83288879901.

It is an interprime number because it is at equal distance from previous prime (10997888233) and next prime (10997888243).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10997888233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 33943938 + ... + 33944261.

It is an arithmetic number, because the mean of its divisors is an integer number (1232170830).

Almost surely, 210997888238 is an apocalyptic number.

10997888238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

10997888238 is an abundant number, since it is smaller than the sum of its proper divisors (13645528362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10997888238 is an equidigital number, since it uses as much as digits as its factorization.

10997888238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67888213 (or 67888204 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 10997888238 in words is "ten billion, nine hundred ninety-seven million, eight hundred eighty-eight thousand, two hundred thirty-eight".

Divisors: 1 2 3 6 9 18 27 54 81 162 67888199 135776398 203664597 407329194 610993791 1221987582 1832981373 3665962746 5498944119 10997888238