620351040 has 56 divisors (see below), whose sum is σ = 1969617600. Its totient is φ = 165426688.

The previous prime is 620351021. The next prime is 620351041. The reversal of 620351040 is 40153026.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 620350998 and 620351016.

It is not an unprimeable number, because it can be changed into a prime (620351041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322140 + ... + 324059.

Almost surely, 2^620351040 is an apocalyptic number.

620351040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620351040 is an abundant number, since it is smaller than the sum of its proper divisors (1349266560).

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

620351040 is a wasteful number, since it uses less digits than its factorization.

620351040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646219 (or 646209 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 620351040 is about 24906.8472513082. The cubic root of 620351040 is about 852.8627994028.

The spelling of 620351040 in words is "six hundred twenty million, three hundred fifty-one thousand, forty".