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135920988 = 2232731127137
BaseRepresentation
bin10000001100111…
…11110101011100
3100110202111112200
420012133311130
5234243432423
621253131500
73240211050
oct1006376534
9313674480
10135920988
116a7a64a5
1239629b90
132220c828
14140a1c60
15bdecd43
hex819fd5c

135920988 has 144 divisors (see below), whose sum is σ = 411500544. Its totient is φ = 37013760.

The previous prime is 135920977. The next prime is 135921029. The reversal of 135920988 is 889029531.

It is a happy number.

It is a super-2 number, since 2×1359209882 = 36949029957792288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 992056 + ... + 992192.

Almost surely, 2135920988 is an apocalyptic number.

135920988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135920988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205750272).

135920988 is an abundant number, since it is smaller than the sum of its proper divisors (275579556).

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

135920988 is a wasteful number, since it uses less digits than its factorization.

135920988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 135920988 is about 11658.5156859696. The cubic root of 135920988 is about 514.1567095741.

The spelling of 135920988 in words is "one hundred thirty-five million, nine hundred twenty thousand, nine hundred eighty-eight".