90445874 has 4 divisors (see below), whose sum is σ = 135668814. Its totient is φ = 45222936.

The previous prime is 90445843. The next prime is 90445891. The reversal of 90445874 is 47854409.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 88642225 + 1803649 = 9415^2 + 1343^2 .

It is a super-2 number, since 2×90445874² = 16360912247247752, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22611467 + ... + 22611470.

Almost surely, 2^90445874 is an apocalyptic number.

90445874 is a deficient number, since it is larger than the sum of its proper divisors (45222940).

90445874 is a wasteful number, since it uses less digits than its factorization.

90445874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45222939.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 90445874 is about 9510.3035703389. The cubic root of 90445874 is about 448.8793084372.

It can be divided in two parts, 90445 and 874, that added together give a palindrome (91319).

The spelling of 90445874 in words is "ninety million, four hundred forty-five thousand, eight hundred seventy-four".