621454572 has 96 divisors (see below), whose sum is σ = 1739404800. Its totient is φ = 191290176.

The previous prime is 621454541. The next prime is 621454573. The reversal of 621454572 is 275454126.

It is a happy number.

621454572 is a `hidden beast` number, since 62 + 145 + 457 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (621454573) 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 31 ways as a sum of consecutive naturals, for example, 67723 + ... + 76349.

It is an arithmetic number, because the mean of its divisors is an integer number (18118800).

Almost surely, 2^621454572 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 621454572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869702400).

621454572 is an abundant number, since it is smaller than the sum of its proper divisors (1117950228).

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

621454572 is a wasteful number, since it uses less digits than its factorization.

621454572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8692 (or 8684 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 621454572 is about 24928.9905932832. The cubic root of 621454572 is about 853.3682142453.

The spelling of 621454572 in words is "six hundred twenty-one million, four hundred fifty-four thousand, five hundred seventy-two".