2156478930 has 32 divisors (see below), whose sum is σ = 5750611200. Its totient is φ = 575060976.

The previous prime is 2156478887. The next prime is 2156478959. The reversal of 2156478930 is 398746512.

2156478930 is a `hidden beast` number, since 2 + 1 + 564 + 7 + 89 + 3 + 0 = 666.

2156478930 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

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

2156478930 is strictly pandigital in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3993210 + ... + 3993749.

It is an arithmetic number, because the mean of its divisors is an integer number (179706600).

It is a 2-persistent number, because it is pandigital, and so is 2⋅2156478930 = 4312957860, but 3⋅2156478930 = 6469436790 is not.

Almost surely, 2^2156478930 is an apocalyptic number.

2156478930 is an abundant number, since it is smaller than the sum of its proper divisors (3594132270).

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

2156478930 is a wasteful number, since it uses less digits than its factorization.

2156478930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7986975 (or 7986969 counting only the distinct ones).

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

The square root of 2156478930 is about 46437.9040224685. The cubic root of 2156478930 is about 1291.9580324369.

The spelling of 2156478930 in words is "two billion, one hundred fifty-six million, four hundred seventy-eight thousand, nine hundred thirty".