621024380 has 24 divisors (see below), whose sum is σ = 1360854432. Its totient is φ = 237609152.

The previous prime is 621024379. The next prime is 621024409. The reversal of 621024380 is 83420126.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674567 + ... + 675486.

It is an arithmetic number, because the mean of its divisors is an integer number (56702268).

Almost surely, 2^621024380 is an apocalyptic number.

It is an amenable number.

621024380 is an abundant number, since it is smaller than the sum of its proper divisors (739830052).

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

621024380 is a wasteful number, since it uses less digits than its factorization.

621024380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350085 (or 1350083 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 621024380 is about 24920.3607518029. The cubic root of 621024380 is about 853.1712586205.

The spelling of 621024380 in words is "six hundred twenty-one million, twenty-four thousand, three hundred eighty".