628744392 has 48 divisors (see below), whose sum is σ = 1719729180. Its totient is φ = 207504000.

The previous prime is 628744379. The next prime is 628744393. The reversal of 628744392 is 293447826.

It can be written as a sum of positive squares in 2 ways, for example, as 387066276 + 241678116 = 19674^2 + 15546^2 .

It is not an unprimeable number, because it can be changed into a prime (628744393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35959 + ... + 50502.

Almost surely, 2^628744392 is an apocalyptic number.

It is an amenable number.

628744392 is an abundant number, since it is smaller than the sum of its proper divisors (1090984788).

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

628744392 is a wasteful number, since it uses less digits than its factorization.

628744392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86574 (or 86567 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 628744392 is about 25074.7760109637. The cubic root of 628744392 is about 856.6919936459.

The spelling of 628744392 in words is "six hundred twenty-eight million, seven hundred forty-four thousand, three hundred ninety-two".