2139145470 has 192 divisors, whose sum is σ = 7239456000. Its totient is φ = 444467520.

The previous prime is 2139145447. The next prime is 2139145507. The reversal of 2139145470 is 745419312.

2139145470 is a `hidden beast` number, since 2 + 139 + 1 + 454 + 70 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 138181 + ... + 152879.

It is an arithmetic number, because the mean of its divisors is an integer number (37705500).

Almost surely, 2^2139145470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139145470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3619728000).

2139145470 is an abundant number, since it is smaller than the sum of its proper divisors (5100310530).

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

2139145470 is a wasteful number, since it uses less digits than its factorization.

2139145470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14740 (or 14727 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 2139145470 is about 46250.8969642752. The cubic root of 2139145470 is about 1288.4871936072.

The spelling of 2139145470 in words is "two billion, one hundred thirty-nine million, one hundred forty-five thousand, four hundred seventy".