2157628704 has 96 divisors (see below), whose sum is σ = 7061354496. Its totient is φ = 560421120.

The previous prime is 2157628703. The next prime is 2157628709. The reversal of 2157628704 is 4078267512.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (2157628703) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 138552 + ... + 153335.

It is an arithmetic number, because the mean of its divisors is an integer number (73555776).

Almost surely, 2^2157628704 is an apocalyptic number.

2157628704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2157628704 is an abundant number, since it is smaller than the sum of its proper divisors (4903725792).

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

2157628704 is a wasteful number, since it uses less digits than its factorization.

2157628704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291918 (or 291910 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 2157628704 is about 46450.2820658820. The cubic root of 2157628704 is about 1292.1876035541.

The spelling of 2157628704 in words is "two billion, one hundred fifty-seven million, six hundred twenty-eight thousand, seven hundred four".