912320640 has 768 divisors, whose sum is σ = 4193130240. Its totient is φ = 178421760.

The previous prime is 912320579. The next prime is 912320653. The reversal of 912320640 is 46023219.

912320640 is a `hidden beast` number, since 9 + 12 + 3 + 2 + 0 + 640 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 95 ways as a sum of consecutive naturals, for example, 53665912 + ... + 53665928.

It is an arithmetic number, because the mean of its divisors is an integer number (5459805).

Almost surely, 2^912320640 is an apocalyptic number.

912320640 is a gapful number since it is divisible by the number (90) 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 912320640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096565120).

912320640 is an abundant number, since it is smaller than the sum of its proper divisors (3280809600).

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

912320640 is a wasteful number, since it uses less digits than its factorization.

912320640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 912320640 is about 30204.6460002431. The cubic root of 912320640 is about 969.8751530962.

Adding to 912320640 its reverse (46023219), we get a palindrome (958343859).

The spelling of 912320640 in words is "nine hundred twelve million, three hundred twenty thousand, six hundred forty".