2157788304 has 225 divisors, whose sum is σ = 7135163763. Its totient is φ = 608707008.

The previous prime is 2157788299. The next prime is 2157788327. The reversal of 2157788304 is 4038877512.

The square root of 2157788304 is 46452.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 2157788304.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 27313737 + ... + 27313815.

Almost surely, 2^2157788304 is an apocalyptic number.

2157788304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

2157788304 is the 46452-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2157788304

2157788304 is an abundant number, since it is smaller than the sum of its proper divisors (4977375459).

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

2157788304 is an frugal number, since it uses more digits than its factorization.

2157788304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The cubic root of 2157788304 is about 1292.2194638484.

The spelling of 2157788304 in words is "two billion, one hundred fifty-seven million, seven hundred eighty-eight thousand, three hundred four".