88690557 has 4 divisors (see below), whose sum is σ = 118254080. Its totient is φ = 59127036.

The previous prime is 88690487. The next prime is 88690559. The reversal of 88690557 is 75509688.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 88690557 - 2⁷ = 88690429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88690559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14781757 + ... + 14781762.

It is an arithmetic number, because the mean of its divisors is an integer number (29563520).

Almost surely, 2^88690557 is an apocalyptic number.

It is an amenable number.

88690557 is a deficient number, since it is larger than the sum of its proper divisors (29563523).

88690557 is a wasteful number, since it uses less digits than its factorization.

88690557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29563522.

The product of its (nonzero) digits is 604800, while the sum is 48.

The square root of 88690557 is about 9417.5664053937. The cubic root of 88690557 is about 445.9564614607.

The spelling of 88690557 in words is "eighty-eight million, six hundred ninety thousand, five hundred fifty-seven".