78872670 has 64 divisors (see below), whose sum is σ = 211256640. Its totient is φ = 20939904.

The previous prime is 78872669. The next prime is 78872671. The reversal of 78872670 is 7627887.

It is an interprime number because it is at equal distance from previous prime (78872669) and next prime (78872671).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78872671) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78612 + ... + 79608.

It is an arithmetic number, because the mean of its divisors is an integer number (3300885).

Almost surely, 2^78872670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78872670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105628320).

78872670 is an abundant number, since it is smaller than the sum of its proper divisors (132383970).

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

78872670 is a wasteful number, since it uses less digits than its factorization.

78872670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306 (or 1300 counting only the distinct ones).

The product of its (nonzero) digits is 263424, while the sum is 45.

The square root of 78872670 is about 8881.0286566366. The cubic root of 78872670 is about 428.8533901681.

The spelling of 78872670 in words is "seventy-eight million, eight hundred seventy-two thousand, six hundred seventy".