78926670 has 64 divisors (see below), whose sum is σ = 213661440. Its totient is φ = 20728224.

The previous prime is 78926663. The next prime is 78926693. The reversal of 78926670 is 7662987.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15909 + ... + 20271.

It is an arithmetic number, because the mean of its divisors is an integer number (3338460).

Almost surely, 2^78926670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78926670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106830720).

78926670 is an abundant number, since it is smaller than the sum of its proper divisors (134734770).

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

78926670 is a wasteful number, since it uses less digits than its factorization.

78926670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446 (or 4440 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 78926670 is about 8884.0683248161. The cubic root of 78926670 is about 428.9512390176.

The spelling of 78926670 in words is "seventy-eight million, nine hundred twenty-six thousand, six hundred seventy".