90775644 has 36 divisors (see below), whose sum is σ = 215961816. Its totient is φ = 29676608.

The previous prime is 90775637. The next prime is 90775667. The reversal of 90775644 is 44657709.

It is a super-2 number, since 2×90775644² = 16480435087229472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90775596 and 90775605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32362 + ... + 35054.

Almost surely, 2^90775644 is an apocalyptic number.

It is an amenable number.

90775644 is an abundant number, since it is smaller than the sum of its proper divisors (125186172).

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

90775644 is a wasteful number, since it uses less digits than its factorization.

90775644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806 (or 2751 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 90775644 is about 9527.6253074940. The cubic root of 90775644 is about 449.4241919206.

It can be divided in two parts, 90775 and 644, that added together give a palindrome (91419).

The spelling of 90775644 in words is "ninety million, seven hundred seventy-five thousand, six hundred forty-four".