78860040 has 128 divisors (see below), whose sum is σ = 272160000. Its totient is φ = 17906688.

The previous prime is 78860017. The next prime is 78860069. The reversal of 78860040 is 4006887.

It is a junction number, because it is equal to n+sod(n) for n = 78859983 and 78860010.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 225786 + ... + 226134.

It is an arithmetic number, because the mean of its divisors is an integer number (2126250).

Almost surely, 2^78860040 is an apocalyptic number.

78860040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78860040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136080000).

78860040 is an abundant number, since it is smaller than the sum of its proper divisors (193299960).

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

78860040 is a wasteful number, since it uses less digits than its factorization.

78860040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 78860040 is about 8880.3175618893. The cubic root of 78860040 is about 428.8304979654.

The spelling of 78860040 in words is "seventy-eight million, eight hundred sixty thousand, forty".