621408650 has 48 divisors (see below), whose sum is σ = 1244652480. Its totient is φ = 229958400.

The previous prime is 621408637. The next prime is 621408659. The reversal of 621408650 is 56804126.

It is a super-2 number, since 2×621408650² = 772297420589645000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621408659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43955 + ... + 56345.

It is an arithmetic number, because the mean of its divisors is an integer number (25930260).

Almost surely, 2^621408650 is an apocalyptic number.

621408650 is an abundant number, since it is smaller than the sum of its proper divisors (623243830).

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

621408650 is a wasteful number, since it uses less digits than its factorization.

621408650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12479 (or 12474 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 621408650 is about 24928.0695201213. The cubic root of 621408650 is about 853.3471940226.

The spelling of 621408650 in words is "six hundred twenty-one million, four hundred eight thousand, six hundred fifty".