2138946570 has 24 divisors (see below), whose sum is σ = 5561261316. Its totient is φ = 570385728.

The previous prime is 2138946553. The next prime is 2138946581. The reversal of 2138946570 is 756498312.

2138946570 is a `hidden beast` number, since 2 + 1 + 38 + 9 + 46 + 570 = 666.

2138946570 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 2 ways, for example, as 2135271681 + 3674889 = 46209^2 + 1917^2 .

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

2138946570 is strictly pandigital in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11882947 + ... + 11883126.

It is a 1-persistent number, because it is pandigital, but 2⋅2138946570 = 4277893140 is not.

Almost surely, 2^2138946570 is an apocalyptic number.

2138946570 is an abundant number, since it is smaller than the sum of its proper divisors (3422314746).

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

2138946570 is a wasteful number, since it uses less digits than its factorization.

2138946570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23766086 (or 23766083 counting only the distinct ones).

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

The square root of 2138946570 is about 46248.7466857211. The cubic root of 2138946570 is about 1288.4472574037.

The spelling of 2138946570 in words is "two billion, one hundred thirty-eight million, nine hundred forty-six thousand, five hundred seventy".