620715240 has 48 divisors (see below), whose sum is σ = 2017325700. Its totient is φ = 165523968.

The previous prime is 620715233. The next prime is 620715289. The reversal of 620715240 is 42517026.

620715240 is a `hidden beast` number, since 620 + 7 + 15 + 24 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 619711236 + 1004004 = 24894^2 + 1002^2 .

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, 861745 + ... + 862464.

Almost surely, 2^620715240 is an apocalyptic number.

620715240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620715240 is an abundant number, since it is smaller than the sum of its proper divisors (1396610460).

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

620715240 is a wasteful number, since it uses less digits than its factorization.

620715240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724226 (or 1724219 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 620715240 is about 24914.1574210327. The cubic root of 620715240 is about 853.0296682914.

The spelling of 620715240 in words is "six hundred twenty million, seven hundred fifteen thousand, two hundred forty".