620653812 has 24 divisors (see below), whose sum is σ = 1449445536. Its totient is φ = 206705568.

The previous prime is 620653793. The next prime is 620653879. The reversal of 620653812 is 218356026.

It is a super-2 number, since 2×620653812² = 770422308700262688, which contains 22 as substring.

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, 7543 + ... + 36030.

It is an arithmetic number, because the mean of its divisors is an integer number (60393564).

Almost surely, 2^620653812 is an apocalyptic number.

It is an amenable number.

620653812 is an abundant number, since it is smaller than the sum of its proper divisors (828791724).

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

620653812 is a wasteful number, since it uses less digits than its factorization.

620653812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44767 (or 44765 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 620653812 is about 24912.9245974855. The cubic root of 620653812 is about 853.0015278325.

The spelling of 620653812 in words is "six hundred twenty million, six hundred fifty-three thousand, eight hundred twelve".