621687948 has 24 divisors (see below), whose sum is σ = 1657834752. Its totient is φ = 177625104.

The previous prime is 621687947. The next prime is 621687959. The reversal of 621687948 is 849786126.

It is a self number, because there is not a number n which added to its sum of digits gives 621687948.

It is not an unprimeable number, because it can be changed into a prime (621687947) 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, 3700440 + ... + 3700607.

It is an arithmetic number, because the mean of its divisors is an integer number (69076448).

Almost surely, 2^621687948 is an apocalyptic number.

It is an amenable number.

621687948 is an abundant number, since it is smaller than the sum of its proper divisors (1036146804).

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

621687948 is a wasteful number, since it uses less digits than its factorization.

621687948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7401061 (or 7401059 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 621687948 is about 24933.6709691934. The cubic root of 621687948 is about 853.4750231979.

The spelling of 621687948 in words is "six hundred twenty-one million, six hundred eighty-seven thousand, nine hundred forty-eight".