78863744 has 32 divisors (see below), whose sum is σ = 160466400. Its totient is φ = 38589952.

The previous prime is 78863723. The next prime is 78863749. The reversal of 78863744 is 44736887.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78863749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539 + ... + 12570.

It is an arithmetic number, because the mean of its divisors is an integer number (5014575).

Almost surely, 2^78863744 is an apocalyptic number.

It is an amenable number.

78863744 is an abundant number, since it is smaller than the sum of its proper divisors (81602656).

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

78863744 is a wasteful number, since it uses less digits than its factorization.

78863744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13170 (or 13158 counting only the distinct ones).

The product of its digits is 903168, while the sum is 47.

The square root of 78863744 is about 8880.5261105410. The cubic root of 78863744 is about 428.8372118148.

The spelling of 78863744 in words is "seventy-eight million, eight hundred sixty-three thousand, seven hundred forty-four".