674866728 has 40 divisors (see below), whose sum is σ = 1890253530. Its totient is φ = 224955360.

The previous prime is 674866723. The next prime is 674866739. The reversal of 674866728 is 827668476.

It can be written as a sum of positive squares in only one way, i.e., 407151684 + 267715044 = 20178^2 + 16362^2 .

It is a super-2 number, since 2×674866728² = 910890201122851968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (674866723) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 520083 + ... + 521378.

Almost surely, 2^674866728 is an apocalyptic number.

It is an amenable number.

674866728 is an abundant number, since it is smaller than the sum of its proper divisors (1215386802).

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

674866728 is a wasteful number, since it uses less digits than its factorization.

674866728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041479 (or 1041466 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 54.

The square root of 674866728 is about 25978.1971660853. The cubic root of 674866728 is about 877.1475858577.

The spelling of 674866728 in words is "six hundred seventy-four million, eight hundred sixty-six thousand, seven hundred twenty-eight".