620317992 has 64 divisors (see below), whose sum is σ = 1784304000. Its totient is φ = 176037120.

The previous prime is 620317991. The next prime is 620318009. The reversal of 620317992 is 299713026.

It is a super-2 number, since 2×620317992² = 769588822397824128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 620317992.

It is not an unprimeable number, because it can be changed into a prime (620317991) 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, 12642 + ... + 37422.

It is an arithmetic number, because the mean of its divisors is an integer number (27879750).

Almost surely, 2^620317992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620317992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (892152000).

620317992 is an abundant number, since it is smaller than the sum of its proper divisors (1163986008).

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

620317992 is a wasteful number, since it uses less digits than its factorization.

620317992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24946 (or 24942 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 620317992 is about 24906.1838104516. The cubic root of 620317992 is about 852.8476542626.

The spelling of 620317992 in words is "six hundred twenty million, three hundred seventeen thousand, nine hundred ninety-two".