90045400 has 24 divisors (see below), whose sum is σ = 209356020. Its totient is φ = 36018080.

The previous prime is 90045367. The next prime is 90045407. The reversal of 90045400 is 454009.

It is a super-2 number, since 2×90045400² = 16216348122320000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90045407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 224914 + ... + 225313.

Almost surely, 2^90045400 is an apocalyptic number.

It is an amenable number.

90045400 is an abundant number, since it is smaller than the sum of its proper divisors (119310620).

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

90045400 is a wasteful number, since it uses less digits than its factorization.

90045400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450243 (or 450234 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 90045400 is about 9489.2254689200. The cubic root of 90045400 is about 448.2158159796.

Adding to 90045400 its reverse (454009), we get a palindrome (90499409).

The spelling of 90045400 in words is "ninety million, forty-five thousand, four hundred".