650492640 has 384 divisors, whose sum is σ = 2661120000. Its totient is φ = 148345344.

The previous prime is 650492639. The next prime is 650492657. The reversal of 650492640 is 46294056.

650492640 is a `hidden beast` number, since 6 + 5 + 0 + 4 + 9 + 2 + 640 = 666.

650492640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 650492595 and 650492604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1481541 + ... + 1481979.

It is an arithmetic number, because the mean of its divisors is an integer number (6930000).

Almost surely, 2^650492640 is an apocalyptic number.

650492640 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 650492640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330560000).

650492640 is an abundant number, since it is smaller than the sum of its proper divisors (2010627360).

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

650492640 is a wasteful number, since it uses less digits than its factorization.

650492640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 650492640 is about 25504.7572033141. The cubic root of 650492640 is about 866.4578931703.

The spelling of 650492640 in words is "six hundred fifty million, four hundred ninety-two thousand, six hundred forty".