621479672 has 32 divisors (see below), whose sum is σ = 1290193920. Its totient is φ = 278271840.

The previous prime is 621479671. The next prime is 621479687. The reversal of 621479672 is 276974126.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621479671) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 46808 + ... + 58599.

It is an arithmetic number, because the mean of its divisors is an integer number (40318560).

Almost surely, 2^621479672 is an apocalyptic number.

It is an amenable number.

621479672 is an abundant number, since it is smaller than the sum of its proper divisors (668714248).

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

621479672 is a wasteful number, since it uses less digits than its factorization.

621479672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105491 (or 105487 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The square root of 621479672 is about 24929.4940181304. The cubic root of 621479672 is about 853.3797030195.

The spelling of 621479672 in words is "six hundred twenty-one million, four hundred seventy-nine thousand, six hundred seventy-two".