628274925 has 18 divisors (see below), whose sum is σ = 1125310602. Its totient is φ = 335079840.

The previous prime is 628274921. The next prime is 628274951. The reversal of 628274925 is 529472826.

It can be written as a sum of positive squares in 3 ways, for example, as 24000201 + 604274724 = 4899^2 + 24582^2 .

It is not a de Polignac number, because 628274925 - 2² = 628274921 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628274921) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1395942 + ... + 1396391.

Almost surely, 2^628274925 is an apocalyptic number.

It is an amenable number.

628274925 is a deficient number, since it is larger than the sum of its proper divisors (497035677).

628274925 is a wasteful number, since it uses less digits than its factorization.

628274925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792349 (or 2792341 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 628274925 is about 25065.4129229901. The cubic root of 628274925 is about 856.4787173829.

The spelling of 628274925 in words is "six hundred twenty-eight million, two hundred seventy-four thousand, nine hundred twenty-five".