78859404 has 72 divisors (see below), whose sum is σ = 216172320. Its totient is φ = 24095232.

The previous prime is 78859399. The next prime is 78859409. The reversal of 78859404 is 40495887.

It is an interprime number because it is at equal distance from previous prime (78859399) and next prime (78859409).

It is a self number, because there is not a number n which added to its sum of digits gives 78859404.

It is not an unprimeable number, because it can be changed into a prime (78859409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77652 + ... + 78660.

Almost surely, 2^78859404 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 78859404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108086160).

78859404 is an abundant number, since it is smaller than the sum of its proper divisors (137312916).

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

78859404 is a wasteful number, since it uses less digits than its factorization.

78859404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 78859404 is about 8880.2817522869. The cubic root of 78859404 is about 428.8293451343.

The spelling of 78859404 in words is "seventy-eight million, eight hundred fifty-nine thousand, four hundred four".