90561756 has 48 divisors (see below), whose sum is σ = 217543424. Its totient is φ = 29310336.

The previous prime is 90561643. The next prime is 90561763. The reversal of 90561756 is 65716509.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57921 + ... + 59463.

Almost surely, 2^90561756 is an apocalyptic number.

It is an amenable number.

90561756 is an abundant number, since it is smaller than the sum of its proper divisors (126981668).

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

90561756 is a wasteful number, since it uses less digits than its factorization.

90561756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690 (or 1688 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 90561756 is about 9516.3940649807. The cubic root of 90561756 is about 449.0709325554.

The spelling of 90561756 in words is "ninety million, five hundred sixty-one thousand, seven hundred fifty-six".