620936820 has 288 divisors, whose sum is σ = 2322754560. Its totient is φ = 137168640.

The previous prime is 620936807. The next prime is 620936831. The reversal of 620936820 is 28639026.

620936820 is a `hidden beast` number, since 620 + 9 + 3 + 6 + 8 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 819882 + ... + 820638.

It is an arithmetic number, because the mean of its divisors is an integer number (8065120).

Almost surely, 2^620936820 is an apocalyptic number.

620936820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620936820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161377280).

620936820 is an abundant number, since it is smaller than the sum of its proper divisors (1701817740).

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

620936820 is a wasteful number, since it uses less digits than its factorization.

620936820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 620936820 is about 24918.6038934769. The cubic root of 620936820 is about 853.1311597188.

The spelling of 620936820 in words is "six hundred twenty million, nine hundred thirty-six thousand, eight hundred twenty".