620553444 has 36 divisors (see below), whose sum is σ = 1684360944. Its totient is φ = 177300816.

The previous prime is 620553421. The next prime is 620553457. The reversal of 620553444 is 444355026.

It is a super-2 number, since 2×620553444² = 770173153720522272, which contains 22 as substring.

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, 527094 + ... + 528269.

It is an arithmetic number, because the mean of its divisors is an integer number (46787804).

Almost surely, 2^620553444 is an apocalyptic number.

It is an amenable number.

620553444 is an abundant number, since it is smaller than the sum of its proper divisors (1063807500).

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

620553444 is a wasteful number, since it uses less digits than its factorization.

620553444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055384 (or 1055375 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

The square root of 620553444 is about 24910.9101399367. The cubic root of 620553444 is about 852.9555447788.

The spelling of 620553444 in words is "six hundred twenty million, five hundred fifty-three thousand, four hundred forty-four".