2156487390 has 24 divisors (see below), whose sum is σ = 5606867448. Its totient is φ = 575063280.

The previous prime is 2156487371. The next prime is 2156487401. The reversal of 2156487390 is 937846512.

2156487390 is a `hidden beast` number, since 2 + 1 + 564 + 87 + 3 + 9 + 0 = 666.

2156487390 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).

2156487390 is strictly pandigital in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11980396 + ... + 11980575.

It is an arithmetic number, because the mean of its divisors is an integer number (233619477).

It is a 1-persistent number, because it is pandigital, but 2⋅2156487390 = 4312974780 is not.

Almost surely, 2^2156487390 is an apocalyptic number.

2156487390 is an abundant number, since it is smaller than the sum of its proper divisors (3450380058).

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

2156487390 is a wasteful number, since it uses less digits than its factorization.

2156487390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23960984 (or 23960981 counting only the distinct ones).

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

The square root of 2156487390 is about 46437.9951117617. The cubic root of 2156487390 is about 1291.9597219118.

The spelling of 2156487390 in words is "two billion, one hundred fifty-six million, four hundred eighty-seven thousand, three hundred ninety".