90863644 has 24 divisors (see below), whose sum is σ = 163159920. Its totient is φ = 44252544.

The previous prime is 90863621. The next prime is 90863653. The reversal of 90863644 is 44636809.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 90863597 and 90863606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111912 + ... + 112720.

It is an arithmetic number, because the mean of its divisors is an integer number (6798330).

Almost surely, 2^90863644 is an apocalyptic number.

It is an amenable number.

90863644 is a deficient number, since it is larger than the sum of its proper divisors (72296276).

90863644 is a wasteful number, since it uses less digits than its factorization.

90863644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509 (or 1507 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 90863644 is about 9532.2423385057. The cubic root of 90863644 is about 449.5693724044.

The spelling of 90863644 in words is "ninety million, eight hundred sixty-three thousand, six hundred forty-four".