90904438 has 4 divisors (see below), whose sum is σ = 136356660. Its totient is φ = 45452218.

The previous prime is 90904409. The next prime is 90904447. The reversal of 90904438 is 83440909.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 90904397 and 90904406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22726108 + ... + 22726111.

It is an arithmetic number, because the mean of its divisors is an integer number (34089165).

Almost surely, 2^90904438 is an apocalyptic number.

90904438 is a deficient number, since it is larger than the sum of its proper divisors (45452222).

90904438 is a wasteful number, since it uses less digits than its factorization.

90904438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45452221.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 90904438 is about 9534.3818887225. The cubic root of 90904438 is about 449.6366416600.

The spelling of 90904438 in words is "ninety million, nine hundred four thousand, four hundred thirty-eight".