621395152 has 160 divisors (see below), whose sum is σ = 1558828800. Its totient is φ = 233570304.

The previous prime is 621395149. The next prime is 621395153. The reversal of 621395152 is 251593126.

It is a super-2 number, since 2×621395152² = 772263869858206208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621395153) 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, 3219568 + ... + 3219760.

It is an arithmetic number, because the mean of its divisors is an integer number (9742680).

Almost surely, 2^621395152 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 621395152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779414400).

621395152 is an abundant number, since it is smaller than the sum of its proper divisors (937433648).

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

621395152 is a wasteful number, since it uses less digits than its factorization.

621395152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 327 counting only the distinct ones).

The product of its digits is 16200, while the sum is 34.

The square root of 621395152 is about 24927.7987796757. The cubic root of 621395152 is about 853.3410152846.

The spelling of 621395152 in words is "six hundred twenty-one million, three hundred ninety-five thousand, one hundred fifty-two".