912447720 has 256 divisors, whose sum is σ = 3212352000. Its totient is φ = 229920768.

The previous prime is 912447691. The next prime is 912447779. The reversal of 912447720 is 27744219.

912447720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2707392 + ... + 2707728.

It is an arithmetic number, because the mean of its divisors is an integer number (12548250).

Almost surely, 2^912447720 is an apocalyptic number.

912447720 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 912447720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606176000).

912447720 is an abundant number, since it is smaller than the sum of its proper divisors (2299904280).

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

912447720 is a wasteful number, since it uses less digits than its factorization.

912447720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 912447720 is about 30206.7495768744. The cubic root of 912447720 is about 969.9201833216.

The spelling of 912447720 in words is "nine hundred twelve million, four hundred forty-seven thousand, seven hundred twenty".