863147440 has 20 divisors (see below), whose sum is σ = 2006817984. Its totient is φ = 345258944.

The previous prime is 863147437. The next prime is 863147459. The reversal of 863147440 is 44741368.

863147440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 863147440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5394592 + ... + 5394751.

Almost surely, 2^863147440 is an apocalyptic number.

863147440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

863147440 is an abundant number, since it is smaller than the sum of its proper divisors (1143670544).

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

863147440 is a wasteful number, since it uses less digits than its factorization.

863147440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10789356 (or 10789350 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 863147440 is about 29379.3709939474. The cubic root of 863147440 is about 952.1272515443.

The spelling of 863147440 in words is "eight hundred sixty-three million, one hundred forty-seven thousand, four hundred forty".