2156847930 has 48 divisors (see below), whose sum is σ = 5663351304. Its totient is φ = 569462400.

The previous prime is 2156847929. The next prime is 2156847941. The reversal of 2156847930 is 397486512.

2156847930 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1736638929 + 420209001 = 41673^2 + 20499^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

2156847930 is strictly pandigital in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 109549 + ... + 127728.

It is a 1-persistent number, because it is pandigital, but 2⋅2156847930 = 4313695860 is not.

Almost surely, 2^2156847930 is an apocalyptic number.

2156847930 is an abundant number, since it is smaller than the sum of its proper divisors (3506503374).

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

2156847930 is a wasteful number, since it uses less digits than its factorization.

2156847930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237391 (or 237388 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2156847930 is about 46441.8769000565. The cubic root of 2156847930 is about 1292.0317181905.

The spelling of 2156847930 in words is "two billion, one hundred fifty-six million, eight hundred forty-seven thousand, nine hundred thirty".