621155260 has 96 divisors (see below), whose sum is σ = 1474780608. Its totient is φ = 217774080.

The previous prime is 621155221. The next prime is 621155279. The reversal of 621155260 is 62551126.

It is a congruent number.

It is an unprimeable number.

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, 1114902 + ... + 1115458.

It is an arithmetic number, because the mean of its divisors is an integer number (15362298).

Almost surely, 2^621155260 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 621155260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737390304).

621155260 is an abundant number, since it is smaller than the sum of its proper divisors (853625348).

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

621155260 is a wasteful number, since it uses less digits than its factorization.

621155260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 621155260 is about 24922.9865786587. The cubic root of 621155260 is about 853.2311892848.

The spelling of 621155260 in words is "six hundred twenty-one million, one hundred fifty-five thousand, two hundred sixty".