649278828 has 60 divisors (see below), whose sum is σ = 1851657192. Its totient is φ = 196750080.

The previous prime is 649278797. The next prime is 649278853. The reversal of 649278828 is 828872946.

649278828 is a `hidden beast` number, since 6 + 492 + 78 + 82 + 8 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 87525 + ... + 94652.

Almost surely, 2^649278828 is an apocalyptic number.

It is an amenable number.

649278828 is an abundant number, since it is smaller than the sum of its proper divisors (1202378364).

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

649278828 is a wasteful number, since it uses less digits than its factorization.

649278828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182204 (or 182193 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The square root of 649278828 is about 25480.9502962507. The cubic root of 649278828 is about 865.9186240244.

The spelling of 649278828 in words is "six hundred forty-nine million, two hundred seventy-eight thousand, eight hundred twenty-eight".