650687040 has 224 divisors, whose sum is σ = 2317455360. Its totient is φ = 171859968.

The previous prime is 650687039. The next prime is 650687057. The reversal of 650687040 is 40786056.

It is a happy number.

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 = 650686986 and 650687004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1096984 + ... + 1097576.

Almost surely, 2^650687040 is an apocalyptic number.

650687040 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 650687040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158727680).

650687040 is an abundant number, since it is smaller than the sum of its proper divisors (1666768320).

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

650687040 is a wasteful number, since it uses less digits than its factorization.

650687040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 650687040 is about 25508.5679723500. The cubic root of 650687040 is about 866.5441983425.

The spelling of 650687040 in words is "six hundred fifty million, six hundred eighty-seven thousand, forty".