621063740 has 48 divisors (see below), whose sum is σ = 1431942624. Its totient is φ = 224390400.

The previous prime is 621063731. The next prime is 621063757. The reversal of 621063740 is 47360126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25550 + ... + 43530.

It is an arithmetic number, because the mean of its divisors is an integer number (29832138).

Almost surely, 2^621063740 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 621063740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715971312).

621063740 is an abundant number, since it is smaller than the sum of its proper divisors (810878884).

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

621063740 is a wasteful number, since it uses less digits than its factorization.

621063740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18158 (or 18156 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 621063740 is about 24921.1504549850. The cubic root of 621063740 is about 853.1892826640.

The spelling of 621063740 in words is "six hundred twenty-one million, sixty-three thousand, seven hundred forty".