90865764 has 36 divisors (see below), whose sum is σ = 250570320. Its totient is φ = 27534960.

The previous prime is 90865763. The next prime is 90865769. The reversal of 90865764 is 46756809.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (90865763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114334 + ... + 115125.

Almost surely, 2^90865764 is an apocalyptic number.

It is an amenable number.

90865764 is an abundant number, since it is smaller than the sum of its proper divisors (159704556).

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

90865764 is a wasteful number, since it uses less digits than its factorization.

90865764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229480 (or 229475 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 90865764 is about 9532.3535393941. The cubic root of 90865764 is about 449.5728687777.

The spelling of 90865764 in words is "ninety million, eight hundred sixty-five thousand, seven hundred sixty-four".