649339120 has 40 divisors (see below), whose sum is σ = 1511688960. Its totient is φ = 259395840.

The previous prime is 649339057. The next prime is 649339127. The reversal of 649339120 is 21933946.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 649339120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649339127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61425 + ... + 71215.

It is an arithmetic number, because the mean of its divisors is an integer number (37792224).

Almost surely, 2^649339120 is an apocalyptic number.

It is an amenable number.

649339120 is an abundant number, since it is smaller than the sum of its proper divisors (862349840).

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

649339120 is a wasteful number, since it uses less digits than its factorization.

649339120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10633 (or 10627 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 649339120 is about 25482.1333486818. The cubic root of 649339120 is about 865.9454262484.

The spelling of 649339120 in words is "six hundred forty-nine million, three hundred thirty-nine thousand, one hundred twenty".