626013728 has 18 divisors (see below), whose sum is σ = 1232743239. Its totient is φ = 312936096.

The previous prime is 626013719. The next prime is 626013743. The reversal of 626013728 is 827310626.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 313006864 + 313006864 = 17692^2 + 17692^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=17692.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 139325 + ... + 143747.

Almost surely, 2^626013728 is an apocalyptic number.

It is an amenable number.

626013728 is a deficient number, since it is larger than the sum of its proper divisors (606729511).

626013728 is an frugal number, since it uses more digits than its factorization.

626013728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856 (or 4425 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 626013728 is about 25020.2663455048. The cubic root of 626013728 is about 855.4499771094.

The spelling of 626013728 in words is "six hundred twenty-six million, thirteen thousand, seven hundred twenty-eight".