2156498730 has 48 divisors (see below), whose sum is σ = 5743660104. Its totient is φ = 561039360.

The previous prime is 2156498711. The next prime is 2156498731. The reversal of 2156498730 is 378946512.

2156498730 is a `hidden beast` number, since 2 + 1 + 564 + 9 + 87 + 3 + 0 = 666.

2156498730 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 812763081 + 1343735649 = 28509^2 + 36657^2 .

It is a super-2 number, since 2×2156498730² = 9300973544983225800, which contains 22 as substring.

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

2156498730 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (2156498731) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288519 + ... + 295898.

It is a 1-persistent number, because it is pandigital, but 2⋅2156498730 = 4312997460 is not.

Almost surely, 2^2156498730 is an apocalyptic number.

2156498730 is an abundant number, since it is smaller than the sum of its proper divisors (3587161374).

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

2156498730 is a wasteful number, since it uses less digits than its factorization.

2156498730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584471 (or 584468 counting only the distinct ones).

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

The square root of 2156498730 is about 46438.1172098956. The cubic root of 2156498730 is about 1291.9619865200.

The spelling of 2156498730 in words is "two billion, one hundred fifty-six million, four hundred ninety-eight thousand, seven hundred thirty".