620557740 has 96 divisors (see below), whose sum is σ = 2106155520. Its totient is φ = 150436800.

The previous prime is 620557739. The next prime is 620557759. The reversal of 620557740 is 47755026.

620557740 is a `hidden beast` number, since 62 + 0 + 557 + 7 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 620557695 and 620557704.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46296 + ... + 58175.

It is an arithmetic number, because the mean of its divisors is an integer number (21939120).

Almost surely, 2^620557740 is an apocalyptic number.

620557740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620557740 is an abundant number, since it is smaller than the sum of its proper divisors (1485597780).

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

620557740 is a wasteful number, since it uses less digits than its factorization.

620557740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104500 (or 104492 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 620557740 is about 24910.9963670665. The cubic root of 620557740 is about 852.9575130694.

The spelling of 620557740 in words is "six hundred twenty million, five hundred fifty-seven thousand, seven hundred forty".