88551640 has 32 divisors (see below), whose sum is σ = 210962880. Its totient is φ = 33336832.

The previous prime is 88551601. The next prime is 88551719. The reversal of 88551640 is 4615588.

It is a self number, because there is not a number n which added to its sum of digits gives 88551640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64432 + ... + 65791.

It is an arithmetic number, because the mean of its divisors is an integer number (6592590).

Almost surely, 2^88551640 is an apocalyptic number.

It is an amenable number.

88551640 is an abundant number, since it is smaller than the sum of its proper divisors (122411240).

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

88551640 is a wasteful number, since it uses less digits than its factorization.

88551640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130251 (or 130247 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 88551640 is about 9410.1880958884. The cubic root of 88551640 is about 445.7235042785.

It can be divided in two parts, 885 and 51640, that added together give a palindrome (52525).

The spelling of 88551640 in words is "eighty-eight million, five hundred fifty-one thousand, six hundred forty".