90875644 has 12 divisors (see below), whose sum is σ = 159108768. Its totient is φ = 45416000.

The previous prime is 90875633. The next prime is 90875683. The reversal of 90875644 is 44657809.

It is a self number, because there is not a number n which added to its sum of digits gives 90875644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7149 + ... + 15259.

It is an arithmetic number, because the mean of its divisors is an integer number (13259064).

Almost surely, 2^90875644 is an apocalyptic number.

It is an amenable number.

90875644 is a deficient number, since it is larger than the sum of its proper divisors (68233124).

90875644 is a wasteful number, since it uses less digits than its factorization.

90875644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10916 (or 10914 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 90875644 is about 9532.8717603878. The cubic root of 90875644 is about 449.5891624794.

It can be divided in two parts, 90875 and 644, that added together give a palindrome (91519).

The spelling of 90875644 in words is "ninety million, eight hundred seventy-five thousand, six hundred forty-four".