621838872 has 48 divisors (see below), whose sum is σ = 1729671840. Its totient is φ = 201676608.

The previous prime is 621838871. The next prime is 621838883. The reversal of 621838872 is 278838126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621838871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114048 + ... + 119375.

It is an arithmetic number, because the mean of its divisors is an integer number (36034830).

Almost surely, 2^621838872 is an apocalyptic number.

It is an amenable number.

621838872 is an abundant number, since it is smaller than the sum of its proper divisors (1107832968).

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

621838872 is a wasteful number, since it uses less digits than its factorization.

621838872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233472 (or 233465 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 621838872 is about 24936.6972953517. The cubic root of 621838872 is about 853.5440821970.

The spelling of 621838872 in words is "six hundred twenty-one million, eight hundred thirty-eight thousand, eight hundred seventy-two".