90919664 has 20 divisors (see below), whose sum is σ = 192171480. Its totient is φ = 41327040.

The previous prime is 90919627. The next prime is 90919679. The reversal of 90919664 is 46691909.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258119 + ... + 258470.

It is an arithmetic number, because the mean of its divisors is an integer number (9608574).

Almost surely, 2^90919664 is an apocalyptic number.

It is an amenable number.

90919664 is an abundant number, since it is smaller than the sum of its proper divisors (101251816).

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

90919664 is a wasteful number, since it uses less digits than its factorization.

90919664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516608 (or 516602 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 90919664 is about 9535.1803339004. The cubic root of 90919664 is about 449.6617441576.

The spelling of 90919664 in words is "ninety million, nine hundred nineteen thousand, six hundred sixty-four".