626240646 has 48 divisors (see below), whose sum is σ = 1481188800. Its totient is φ = 197757288.

The previous prime is 626240599. The next prime is 626240687. The reversal of 626240646 is 646042626.

626240646 is a `hidden beast` number, since 6 + 2 + 6 + 2 + 4 + 0 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 626240646.

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, 24676 + ... + 43143.

It is an arithmetic number, because the mean of its divisors is an integer number (30858100).

Almost surely, 2^626240646 is an apocalyptic number.

626240646 is an abundant number, since it is smaller than the sum of its proper divisors (854948154).

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

626240646 is a wasteful number, since it uses less digits than its factorization.

626240646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67855 (or 67843 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 626240646 is about 25024.8006185864. The cubic root of 626240646 is about 855.5533260401.

The spelling of 626240646 in words is "six hundred twenty-six million, two hundred forty thousand, six hundred forty-six".