90817964 has 24 divisors (see below), whose sum is σ = 161963760. Its totient is φ = 44548416.

The previous prime is 90817949. The next prime is 90817973. The reversal of 90817964 is 46971809.

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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84422 + ... + 85490.

It is an arithmetic number, because the mean of its divisors is an integer number (6748490).

Almost surely, 2^90817964 is an apocalyptic number.

It is an amenable number.

90817964 is a deficient number, since it is larger than the sum of its proper divisors (71145796).

90817964 is a wasteful number, since it uses less digits than its factorization.

90817964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 90817964 is about 9529.8459588810. The cubic root of 90817964 is about 449.4940222409.

The spelling of 90817964 in words is "ninety million, eight hundred seventeen thousand, nine hundred sixty-four".