649925850 has 192 divisors, whose sum is σ = 1951875072. Its totient is φ = 139968000.

The previous prime is 649925833. The next prime is 649925869. The reversal of 649925850 is 58529946.

It is a super-2 number, since 2×649925850² = 844807220996445000, which contains 22 as substring.

It is a cake number, because a cake can be divided into 649925850 parts by 1574 planar cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 649925850.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1334307 + ... + 1334793.

It is an arithmetic number, because the mean of its divisors is an integer number (10166016).

Almost surely, 2^649925850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649925850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975937536).

649925850 is an abundant number, since it is smaller than the sum of its proper divisors (1301949222).

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

649925850 is a wasteful number, since it uses less digits than its factorization.

649925850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 576 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 649925850 is about 25493.6433253468. The cubic root of 649925850 is about 866.2061647910.

The spelling of 649925850 in words is "six hundred forty-nine million, nine hundred twenty-five thousand, eight hundred fifty".