90863636 has 6 divisors (see below), whose sum is σ = 159011370. Its totient is φ = 45431816.

The previous prime is 90863621. The next prime is 90863653. The reversal of 90863636 is 63636809.

It can be written as a sum of positive squares in only one way, i.e., 66912400 + 23951236 = 8180^2 + 4894^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90863593 and 90863602.

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, 11357951 + ... + 11357958.

It is an arithmetic number, because the mean of its divisors is an integer number (26501895).

Almost surely, 2^90863636 is an apocalyptic number.

It is an amenable number.

90863636 is a deficient number, since it is larger than the sum of its proper divisors (68147734).

90863636 is a wasteful number, since it uses less digits than its factorization.

90863636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715913 (or 22715911 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 90863636 is about 9532.2419188772. The cubic root of 90863636 is about 449.5693592105.

The spelling of 90863636 in words is "ninety million, eight hundred sixty-three thousand, six hundred thirty-six".