2154188928 has 32 divisors (see below), whose sum is σ = 5722065360. Its totient is φ = 718062848.

The previous prime is 2154188917. The next prime is 2154188963. The reversal of 2154188928 is 8298814512.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2804550 + ... + 2805317.

Almost surely, 2^2154188928 is an apocalyptic number.

It is an amenable number.

2154188928 is an abundant number, since it is smaller than the sum of its proper divisors (3567876432).

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

2154188928 is an equidigital number, since it uses as much as digits as its factorization.

2154188928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609884 (or 5609872 counting only the distinct ones).

The product of its digits is 368640, while the sum is 48.

The square root of 2154188928 is about 46413.2408693898. The cubic root of 2154188928 is about 1291.5005529916.

The spelling of 2154188928 in words is "two billion, one hundred fifty-four million, one hundred eighty-eight thousand, nine hundred twenty-eight".