621434260 has 24 divisors (see below), whose sum is σ = 1313330760. Its totient is φ = 246989184.

The previous prime is 621434251. The next prime is 621434293. The reversal of 621434260 is 62434126.

It can be written as a sum of positive squares in 4 ways, for example, as 228484 + 621205776 = 478^2 + 24924^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95815 + ... + 102094.

It is an arithmetic number, because the mean of its divisors is an integer number (54722115).

Almost surely, 2^621434260 is an apocalyptic number.

It is an amenable number.

621434260 is an abundant number, since it is smaller than the sum of its proper divisors (691896500).

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

621434260 is a wasteful number, since it uses less digits than its factorization.

621434260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198075 (or 198073 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 621434260 is about 24928.5831927930. The cubic root of 621434260 is about 853.3589168084.

Adding to 621434260 its reverse (62434126), we get a palindrome (683868386).

The spelling of 621434260 in words is "six hundred twenty-one million, four hundred thirty-four thousand, two hundred sixty".