621219072 has 72 divisors (see below), whose sum is σ = 1657684000. Its totient is φ = 206530560.

The previous prime is 621219031. The next prime is 621219073. The reversal of 621219072 is 270912126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621219073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382422 + ... + 384042.

Almost surely, 2^621219072 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 621219072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828842000).

621219072 is an abundant number, since it is smaller than the sum of its proper divisors (1036464928).

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

621219072 is a wasteful number, since it uses less digits than its factorization.

621219072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139 (or 2125 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 621219072 is about 24924.2667294346. The cubic root of 621219072 is about 853.2604060941.

The spelling of 621219072 in words is "six hundred twenty-one million, two hundred nineteen thousand, seventy-two".