628887425 has 12 divisors (see below), whose sum is σ = 782321580. Its totient is φ = 501496320.

The previous prime is 628887379. The next prime is 628887437. The reversal of 628887425 is 524788826.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 150896656 + 477990769 = 12284^2 + 21863^2 .

It is not a de Polignac number, because 628887425 - 2⁶ = 628887361 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32360 + ... + 48009.

It is an arithmetic number, because the mean of its divisors is an integer number (65193465).

Almost surely, 2^628887425 is an apocalyptic number.

It is an amenable number.

628887425 is a deficient number, since it is larger than the sum of its proper divisors (153434155).

628887425 is a wasteful number, since it uses less digits than its factorization.

628887425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80692 (or 80687 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 50.

The square root of 628887425 is about 25077.6279779408. The cubic root of 628887425 is about 856.7569516463.

The spelling of 628887425 in words is "six hundred twenty-eight million, eight hundred eighty-seven thousand, four hundred twenty-five".