620854864 has 40 divisors (see below), whose sum is σ = 1375963520. Its totient is φ = 265845888.

The previous prime is 620854837. The next prime is 620854903. The reversal of 620854864 is 468458026.

It is a self number, because there is not a number n which added to its sum of digits gives 620854864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198142 + ... + 201250.

It is an arithmetic number, because the mean of its divisors is an integer number (34399088).

Almost surely, 2^620854864 is an apocalyptic number.

It is an amenable number.

620854864 is an abundant number, since it is smaller than the sum of its proper divisors (755108656).

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

620854864 is a wasteful number, since it uses less digits than its factorization.

620854864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4907 (or 4901 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The square root of 620854864 is about 24916.9593650590. The cubic root of 620854864 is about 853.0936238046.

The spelling of 620854864 in words is "six hundred twenty million, eight hundred fifty-four thousand, eight hundred sixty-four".