620671680 has 112 divisors (see below), whose sum is σ = 2189622240. Its totient is φ = 165510144.

The previous prime is 620671661. The next prime is 620671697. The reversal of 620671680 is 86176026.

It is a happy number.

620671680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27279 + ... + 44558.

Almost surely, 2^620671680 is an apocalyptic number.

620671680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

620671680 is an abundant number, since it is smaller than the sum of its proper divisors (1568950560).

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

620671680 is a wasteful number, since it uses less digits than its factorization.

620671680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71863 (or 71847 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 620671680 is about 24913.2832039456. The cubic root of 620671680 is about 853.0097134398.

The spelling of 620671680 in words is "six hundred twenty million, six hundred seventy-one thousand, six hundred eighty".