620494400 has 84 divisors (see below), whose sum is σ = 1607240880. Its totient is φ = 235123200.

The previous prime is 620494393. The next prime is 620494447. The reversal of 620494400 is 4494026.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20195 + ... + 40605.

It is an arithmetic number, because the mean of its divisors is an integer number (19133820).

Almost surely, 2^620494400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620494400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803620440).

620494400 is an abundant number, since it is smaller than the sum of its proper divisors (986746480).

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

620494400 is a wasteful number, since it uses less digits than its factorization.

620494400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20452 (or 20437 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 620494400 is about 24909.7250085183. The cubic root of 620494400 is about 852.9284917747.

The spelling of 620494400 in words is "six hundred twenty million, four hundred ninety-four thousand, four hundred".