88129881 has 36 divisors (see below), whose sum is σ = 148772052. Its totient is φ = 50125824.

The previous prime is 88129871. The next prime is 88129891. The reversal of 88129881 is 18892188.

It is an interprime number because it is at equal distance from previous prime (88129871) and next prime (88129891).

It can be written as a sum of positive squares in 2 ways, for example, as 38638656 + 49491225 = 6216^2 + 7035^2 .

It is not a de Polignac number, because 88129881 - 2⁹ = 88129369 is a prime.

It is a super-2 number, since 2×88129881² = 15533751850148322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88129861) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 148321 + ... + 148913.

It is an arithmetic number, because the mean of its divisors is an integer number (4132557).

Almost surely, 2^88129881 is an apocalyptic number.

It is an amenable number.

88129881 is a deficient number, since it is larger than the sum of its proper divisors (60642171).

88129881 is a wasteful number, since it uses less digits than its factorization.

88129881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950 (or 940 counting only the distinct ones).

The product of its digits is 73728, while the sum is 45.

The square root of 88129881 is about 9387.7516477589. The cubic root of 88129881 is about 445.0147383916.

The spelling of 88129881 in words is "eighty-eight million, one hundred twenty-nine thousand, eight hundred eighty-one".