621140366 has 48 divisors (see below), whose sum is σ = 1220562432. Its totient is φ = 234183600.

The previous prime is 621140353. The next prime is 621140371. The reversal of 621140366 is 663041126.

It is a happy number.

It is a super-2 number, since 2×621140366² = 771630708549227912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24125 + ... + 42711.

It is an arithmetic number, because the mean of its divisors is an integer number (25428384).

Almost surely, 2^621140366 is an apocalyptic number.

621140366 is a deficient number, since it is larger than the sum of its proper divisors (599422066).

621140366 is a wasteful number, since it uses less digits than its factorization.

621140366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18645 (or 18638 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 621140366 is about 24922.6877764016. The cubic root of 621140366 is about 853.2243696657.

The spelling of 621140366 in words is "six hundred twenty-one million, one hundred forty thousand, three hundred sixty-six".