863744540 has 24 divisors (see below), whose sum is σ = 1858105872. Its totient is φ = 337070720.

The previous prime is 863744533. The next prime is 863744543. The reversal of 863744540 is 45447368.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863744543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525854 + ... + 527493.

It is an arithmetic number, because the mean of its divisors is an integer number (77421078).

Almost surely, 2^863744540 is an apocalyptic number.

It is an amenable number.

863744540 is an abundant number, since it is smaller than the sum of its proper divisors (994361332).

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

863744540 is a wasteful number, since it uses less digits than its factorization.

863744540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053397 (or 1053395 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The square root of 863744540 is about 29389.5311292984. The cubic root of 863744540 is about 952.3467521425.

The spelling of 863744540 in words is "eight hundred sixty-three million, seven hundred forty-four thousand, five hundred forty".