649885026 has 32 divisors (see below), whose sum is σ = 1486218240. Its totient is φ = 185585616.

The previous prime is 649885021. The next prime is 649885037. The reversal of 649885026 is 620588946.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (649885021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136555 + ... + 141233.

It is an arithmetic number, because the mean of its divisors is an integer number (46444320).

Almost surely, 2^649885026 is an apocalyptic number.

649885026 is an abundant number, since it is smaller than the sum of its proper divisors (836333214).

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

649885026 is a wasteful number, since it uses less digits than its factorization.

649885026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7998.

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 649885026 is about 25492.8426425928. The cubic root of 649885026 is about 866.1880279831.

The spelling of 649885026 in words is "six hundred forty-nine million, eight hundred eighty-five thousand, twenty-six".