621380884 has 6 divisors (see below), whose sum is σ = 1087416554. Its totient is φ = 310690440.

The previous prime is 621380867. The next prime is 621380909. The reversal of 621380884 is 488083126.

It can be written as a sum of positive squares in only one way, i.e., 500864400 + 120516484 = 22380^2 + 10978^2 .

It is a super-2 number, since 2×621380884² = 772228406001242912, 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 as a sum of consecutive naturals, namely, 77672607 + ... + 77672614.

Almost surely, 2^621380884 is an apocalyptic number.

It is an amenable number.

621380884 is a deficient number, since it is larger than the sum of its proper divisors (466035670).

621380884 is a wasteful number, since it uses less digits than its factorization.

621380884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155345225 (or 155345223 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 621380884 is about 24927.5125915122. The cubic root of 621380884 is about 853.3344839801.

The spelling of 621380884 in words is "six hundred twenty-one million, three hundred eighty thousand, eight hundred eighty-four".