621348380 has 24 divisors (see below), whose sum is σ = 1312128720. Its totient is φ = 247149440.

The previous prime is 621348359. The next prime is 621348397. The reversal of 621348380 is 83843126.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 621348380.

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, 83201 + ... + 90360.

It is an arithmetic number, because the mean of its divisors is an integer number (54672030).

Almost surely, 2^621348380 is an apocalyptic number.

It is an amenable number.

621348380 is an abundant number, since it is smaller than the sum of its proper divisors (690780340).

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

621348380 is a wasteful number, since it uses less digits than its factorization.

621348380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173749 (or 173747 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 621348380 is about 24926.8606126002. The cubic root of 621348380 is about 853.3196046104.

The spelling of 621348380 in words is "six hundred twenty-one million, three hundred forty-eight thousand, three hundred eighty".