649341220 has 48 divisors (see below), whose sum is σ = 1509818688. Its totient is φ = 232594560.

The previous prime is 649341191. The next prime is 649341247. The reversal of 649341220 is 22143946.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7287 + ... + 36766.

It is an arithmetic number, because the mean of its divisors is an integer number (31454556).

Almost surely, 2^649341220 is an apocalyptic number.

It is an amenable number.

649341220 is an abundant number, since it is smaller than the sum of its proper divisors (860477468).

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

649341220 is a wasteful number, since it uses less digits than its factorization.

649341220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44140 (or 44138 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 649341220 is about 25482.1745539897. The cubic root of 649341220 is about 865.9463597531.

The spelling of 649341220 in words is "six hundred forty-nine million, three hundred forty-one thousand, two hundred twenty".