620750646 has 24 divisors (see below), whose sum is σ = 1358280144. Its totient is φ = 204867600.

The previous prime is 620750633. The next prime is 620750671. The reversal of 620750646 is 646057026.

620750646 is a `hidden beast` number, since 6 + 2 + 0 + 7 + 5 + 0 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 620750646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168906 + ... + 172541.

It is an arithmetic number, because the mean of its divisors is an integer number (56595006).

Almost surely, 2^620750646 is an apocalyptic number.

620750646 is an abundant number, since it is smaller than the sum of its proper divisors (737529498).

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

620750646 is a wasteful number, since it uses less digits than its factorization.

620750646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341556 (or 341553 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 620750646 is about 24914.8679707519. The cubic root of 620750646 is about 853.0458871049.

The spelling of 620750646 in words is "six hundred twenty million, seven hundred fifty thousand, six hundred forty-six".