620972180 has 12 divisors (see below), whose sum is σ = 1304041620. Its totient is φ = 248388864.

The previous prime is 620972173. The next prime is 620972197. The reversal of 620972180 is 81279026.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 366952336 + 254019844 = 19156^2 + 15938^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 620972180.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15524285 + ... + 15524324.

It is an arithmetic number, because the mean of its divisors is an integer number (108670135).

Almost surely, 2^620972180 is an apocalyptic number.

It is an amenable number.

620972180 is an abundant number, since it is smaller than the sum of its proper divisors (683069440).

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

620972180 is a wasteful number, since it uses less digits than its factorization.

620972180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31048618 (or 31048616 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 620972180 is about 24919.3133934304. The cubic root of 620972180 is about 853.1473536075.

The spelling of 620972180 in words is "six hundred twenty million, nine hundred seventy-two thousand, one hundred eighty".