649057970 has 32 divisors (see below), whose sum is σ = 1276243776. Its totient is φ = 235700800.

The previous prime is 649057889. The next prime is 649057973. The reversal of 649057970 is 79750946.

It is not an unprimeable number, because it can be changed into a prime (649057973) 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, 86717 + ... + 93903.

It is an arithmetic number, because the mean of its divisors is an integer number (39882618).

Almost surely, 2^649057970 is an apocalyptic number.

649057970 is a deficient number, since it is larger than the sum of its proper divisors (627185806).

649057970 is a wasteful number, since it uses less digits than its factorization.

649057970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8026.

The product of its (nonzero) digits is 476280, while the sum is 47.

The square root of 649057970 is about 25476.6161410812. The cubic root of 649057970 is about 865.8204295683.

The spelling of 649057970 in words is "six hundred forty-nine million, fifty-seven thousand, nine hundred seventy".