90471904 has 24 divisors (see below), whose sum is σ = 179852400. Its totient is φ = 44795136.

The previous prime is 90471881. The next prime is 90471911. The reversal of 90471904 is 40917409.

It is a self number, because there is not a number n which added to its sum of digits gives 90471904.

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, 10429 + ... + 17020.

It is an arithmetic number, because the mean of its divisors is an integer number (7493850).

Almost surely, 2^90471904 is an apocalyptic number.

It is an amenable number.

90471904 is a deficient number, since it is larger than the sum of its proper divisors (89380496).

90471904 is a wasteful number, since it uses less digits than its factorization.

90471904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27562 (or 27554 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 90471904 is about 9511.6719876161. The cubic root of 90471904 is about 448.9223662616.

The spelling of 90471904 in words is "ninety million, four hundred seventy-one thousand, nine hundred four".