90556 has 6 divisors (see below), whose sum is σ = 158480. Its totient is φ = 45276.

The previous prime is 90547. The next prime is 90583. The reversal of 90556 is 65509.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90556.

It is a congruent number.

It is an unprimeable number.

90556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11316 + ... + 11323.

2⁹⁰⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

90556 is a deficient number, since it is larger than the sum of its proper divisors (67924).

90556 is a wasteful number, since it uses less digits than its factorization.

90556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22643 (or 22641 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 90556 is about 300.9252398853. The cubic root of 90556 is about 44.9061418212.

It can be divided in two parts, 905 and 56, that added together give a square (961 = 31²).

The spelling of 90556 in words is "ninety thousand, five hundred fifty-six".