621140626 has 16 divisors (see below), whose sum is σ = 963010944. Its totient is φ = 300296464.

The previous prime is 621140563. The next prime is 621140629. The reversal of 621140626 is 626041126.

It is a junction number, because it is equal to n+sod(n) for n = 621140594 and 621140603.

It is not an unprimeable number, because it can be changed into a prime (621140629) 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 7 ways as a sum of consecutive naturals, for example, 32005 + ... + 47608.

It is an arithmetic number, because the mean of its divisors is an integer number (60188184).

Almost surely, 2^621140626 is an apocalyptic number.

621140626 is a deficient number, since it is larger than the sum of its proper divisors (341870318).

621140626 is a wasteful number, since it uses less digits than its factorization.

621140626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79745.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 621140626 is about 24922.6929925319. The cubic root of 621140626 is about 853.2244887146.

The spelling of 621140626 in words is "six hundred twenty-one million, one hundred forty thousand, six hundred twenty-six".