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10990215 = 33581409
BaseRepresentation
bin101001111011…
…001010000111
3202200100202000
4221323022013
510303141330
61031320343
7162262305
oct51731207
922610660
1010990215
116227125
1238200b3
13237a4b2
141661275
15e71560
hexa7b287

10990215 has 16 divisors (see below), whose sum is σ = 19538400. Its totient is φ = 5861376.

The previous prime is 10990183. The next prime is 10990219. The reversal of 10990215 is 51209901.

It is a happy number.

It is not a de Polignac number, because 10990215 - 25 = 10990183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a cake number, because a cake can be divided into 10990215 parts by 404 planar cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10990219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40570 + ... + 40839.

It is an arithmetic number, because the mean of its divisors is an integer number (1221150).

Almost surely, 210990215 is an apocalyptic number.

10990215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10990215 is a deficient number, since it is larger than the sum of its proper divisors (8548185).

10990215 is an equidigital number, since it uses as much as digits as its factorization.

10990215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81423 (or 81417 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 10990215 is about 3315.1493179041. The cubic root of 10990215 is about 222.3320451144.

The spelling of 10990215 in words is "ten million, nine hundred ninety thousand, two hundred fifteen".

Divisors: 1 3 5 9 15 27 45 135 81409 244227 407045 732681 1221135 2198043 3663405 10990215