20088400 has 30 divisors (see below), whose sum is σ = 48263342. Its totient is φ = 8035200.

The previous prime is 20088391. The next prime is 20088427. The reversal of 20088400 is 488002.

It can be written as a sum of positive squares in 3 ways, for example, as 53824 + 20034576 = 232^2 + 4476^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24711 + ... + 25510.

Almost surely, 2^20088400 is an apocalyptic number.

20088400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20088400 is an abundant number, since it is smaller than the sum of its proper divisors (28174942).

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

20088400 is a wasteful number, since it uses less digits than its factorization.

20088400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50239 (or 50228 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 20088400 is about 4482.0084783499. The cubic root of 20088400 is about 271.8410980760.

The spelling of 20088400 in words is "twenty million, eighty-eight thousand, four hundred".