649197360 has 240 divisors, whose sum is σ = 2638598976. Its totient is φ = 139640832.

The previous prime is 649197347. The next prime is 649197389. The reversal of 649197360 is 63791946.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81892 + ... + 89468.

Almost surely, 2^649197360 is an apocalyptic number.

649197360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649197360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1319299488).

649197360 is an abundant number, since it is smaller than the sum of its proper divisors (1989401616).

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

649197360 is a wasteful number, since it uses less digits than its factorization.

649197360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7620 (or 7611 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 649197360 is about 25479.3516401026. The cubic root of 649197360 is about 865.8824055790.

The spelling of 649197360 in words is "six hundred forty-nine million, one hundred ninety-seven thousand, three hundred sixty".