649167828 has 12 divisors (see below), whose sum is σ = 1514724960. Its totient is φ = 216389272.

The previous prime is 649167811. The next prime is 649167829. The reversal of 649167828 is 828761946.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649167829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27048648 + ... + 27048671.

It is an arithmetic number, because the mean of its divisors is an integer number (126227080).

Almost surely, 2^649167828 is an apocalyptic number.

It is an amenable number.

649167828 is an abundant number, since it is smaller than the sum of its proper divisors (865557132).

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

649167828 is a wasteful number, since it uses less digits than its factorization.

649167828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54097326 (or 54097324 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 51.

The square root of 649167828 is about 25478.7721054214. The cubic root of 649167828 is about 865.8692757110.

The spelling of 649167828 in words is "six hundred forty-nine million, one hundred sixty-seven thousand, eight hundred twenty-eight".