649659290 has 16 divisors (see below), whose sum is σ = 1336442112. Its totient is φ = 222740304.

The previous prime is 649659289. The next prime is 649659313. The reversal of 649659290 is 92956946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4640354 + ... + 4640493.

It is an arithmetic number, because the mean of its divisors is an integer number (83527632).

Almost surely, 2^649659290 is an apocalyptic number.

649659290 is an abundant number, since it is smaller than the sum of its proper divisors (686782822).

649659290 is a wasteful number, since it uses less digits than its factorization.

649659290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280861.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The square root of 649659290 is about 25488.4148192860. The cubic root of 649659290 is about 866.0877269267.

The spelling of 649659290 in words is "six hundred forty-nine million, six hundred fifty-nine thousand, two hundred ninety".