916562640 has 240 divisors, whose sum is σ = 3363802560. Its totient is φ = 205793280.

The previous prime is 916562639. The next prime is 916562681. The reversal of 916562640 is 46265619.

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

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 693180 + ... + 694500.

It is an arithmetic number, because the mean of its divisors is an integer number (14015844).

Almost surely, 2^916562640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 916562640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1681901280).

916562640 is an abundant number, since it is smaller than the sum of its proper divisors (2447239920).

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

916562640 is a wasteful number, since it uses less digits than its factorization.

916562640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410 (or 1397 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 916562640 is about 30274.7855483734. The cubic root of 916562640 is about 971.3760326669.

The spelling of 916562640 in words is "nine hundred sixteen million, five hundred sixty-two thousand, six hundred forty".