2139523960 has 64 divisors (see below), whose sum is σ = 5507812800. Its totient is φ = 732727296.

The previous prime is 2139523949. The next prime is 2139523961. The reversal of 2139523960 is 693259312.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139523961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278734 + ... + 286306.

It is an arithmetic number, because the mean of its divisors is an integer number (86059575).

Almost surely, 2^2139523960 is an apocalyptic number.

2139523960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2139523960 is an abundant number, since it is smaller than the sum of its proper divisors (3368288840).

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

2139523960 is a wasteful number, since it uses less digits than its factorization.

2139523960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8600 (or 8596 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 2139523960 is about 46254.9884877296. The cubic root of 2139523960 is about 1288.5631820124.

The spelling of 2139523960 in words is "two billion, one hundred thirty-nine million, five hundred twenty-three thousand, nine hundred sixty".