916991250 has 160 divisors (see below), whose sum is σ = 2647252608. Its totient is φ = 207360000.

The previous prime is 916991249. The next prime is 916991261. The reversal of 916991250 is 52199619.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4751154 + ... + 4751346.

Almost surely, 2^916991250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 916991250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323626304).

916991250 is an abundant number, since it is smaller than the sum of its proper divisors (1730261358).

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

916991250 is a wasteful number, since it uses less digits than its factorization.

916991250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 916991250 is about 30281.8633838805. The cubic root of 916991250 is about 971.5274231565.

The spelling of 916991250 in words is "nine hundred sixteen million, nine hundred ninety-one thousand, two hundred fifty".