78793884 has 90 divisors (see below), whose sum is σ = 223201440. Its totient is φ = 24227424.

The previous prime is 78793879. The next prime is 78793903. The reversal of 78793884 is 48839787.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 78793884.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 54037 + ... + 55475.

It is an arithmetic number, because the mean of its divisors is an integer number (2480016).

Almost surely, 2^78793884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78793884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111600720).

78793884 is an abundant number, since it is smaller than the sum of its proper divisors (144407556).

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

78793884 is a wasteful number, since it uses less digits than its factorization.

78793884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1457 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 78793884 is about 8876.5919135668. The cubic root of 78793884 is about 428.7105485492.

The spelling of 78793884 in words is "seventy-eight million, seven hundred ninety-three thousand, eight hundred eighty-four".