1979372520 has 48 divisors (see below), whose sum is σ = 6432961860. Its totient is φ = 527832576.

The previous prime is 1979372489. The next prime is 1979372561. The reversal of 1979372520 is 252739791.

1979372520 is a `hidden beast` number, since 1 + 97 + 9 + 37 + 2 + 520 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1852269444 + 127103076 = 43038^2 + 11274^2 .

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

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, 2748769 + ... + 2749488.

Almost surely, 2^1979372520 is an apocalyptic number.

1979372520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1979372520 is an abundant number, since it is smaller than the sum of its proper divisors (4453589340).

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

1979372520 is a wasteful number, since it uses less digits than its factorization.

1979372520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498274 (or 5498267 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 1979372520 is about 44490.1395817096. The cubic root of 1979372520 is about 1255.5745732828.

The spelling of 1979372520 in words is "one billion, nine hundred seventy-nine million, three hundred seventy-two thousand, five hundred twenty".