621634442 has 32 divisors (see below), whose sum is σ = 1111852224. Its totient is φ = 256924800.

The previous prime is 621634439. The next prime is 621634487. The reversal of 621634442 is 244436126.

It is a junction number, because it is equal to n+sod(n) for n = 621634399 and 621634408.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2942 + ... + 35382.

It is an arithmetic number, because the mean of its divisors is an integer number (34745382).

Almost surely, 2^621634442 is an apocalyptic number.

621634442 is a deficient number, since it is larger than the sum of its proper divisors (490217782).

621634442 is a wasteful number, since it uses less digits than its factorization.

621634442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32534.

The product of its digits is 27648, while the sum is 32.

The square root of 621634442 is about 24932.5979793523. The cubic root of 621634442 is about 853.4505375242.

The spelling of 621634442 in words is "six hundred twenty-one million, six hundred thirty-four thousand, four hundred forty-two".