649149240 has 64 divisors (see below), whose sum is σ = 2032128000. Its totient is φ = 165579392.

The previous prime is 649149229. The next prime is 649149287. The reversal of 649149240 is 42941946.

649149240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 114840 + ... + 120359.

It is an arithmetic number, because the mean of its divisors is an integer number (31752000).

Almost surely, 2^649149240 is an apocalyptic number.

649149240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

649149240 is an abundant number, since it is smaller than the sum of its proper divisors (1382978760).

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

649149240 is a wasteful number, since it uses less digits than its factorization.

649149240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235236 (or 235232 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 649149240 is about 25478.4073285596. The cubic root of 649149240 is about 865.8610113193.

The spelling of 649149240 in words is "six hundred forty-nine million, one hundred forty-nine thousand, two hundred forty".