621948984 has 32 divisors (see below), whose sum is σ = 1596898320. Its totient is φ = 201712896.

The previous prime is 621948959. The next prime is 621948989. The reversal of 621948984 is 489849126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621948989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349309 + ... + 351084.

Almost surely, 2^621948984 is an apocalyptic number.

It is an amenable number.

621948984 is an abundant number, since it is smaller than the sum of its proper divisors (974949336).

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

621948984 is a wasteful number, since it uses less digits than its factorization.

621948984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700439 (or 700435 counting only the distinct ones).

The product of its digits is 995328, while the sum is 51.

The square root of 621948984 is about 24938.9050280881. The cubic root of 621948984 is about 853.5944596089.

The spelling of 621948984 in words is "six hundred twenty-one million, nine hundred forty-eight thousand, nine hundred eighty-four".