621914652 has 24 divisors (see below), whose sum is σ = 1612371600. Its totient is φ = 207304848.

The previous prime is 621914533. The next prime is 621914659. The reversal of 621914652 is 256419126.

621914652 is a `hidden beast` number, since 6 + 2 + 191 + 465 + 2 = 666.

It is a super-2 number, since 2×621914652² = 773555668744562208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621914659) 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, 2879127 + ... + 2879342.

It is an arithmetic number, because the mean of its divisors is an integer number (67182150).

Almost surely, 2^621914652 is an apocalyptic number.

It is an amenable number.

621914652 is an abundant number, since it is smaller than the sum of its proper divisors (990456948).

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

621914652 is a wasteful number, since it uses less digits than its factorization.

621914652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5758482 (or 5758474 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 621914652 is about 24938.2166964681. The cubic root of 621914652 is about 853.5787529915.

The spelling of 621914652 in words is "six hundred twenty-one million, nine hundred fourteen thousand, six hundred fifty-two".