78946407 has 20 divisors (see below), whose sum is σ = 118270240. Its totient is φ = 52480224.

The previous prime is 78946397. The next prime is 78946421. The reversal of 78946407 is 70464987.

It is not a de Polignac number, because 78946407 - 2¹⁶ = 78880871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78946447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31938 + ... + 34320.

It is an arithmetic number, because the mean of its divisors is an integer number (5913512).

Almost surely, 2^78946407 is an apocalyptic number.

78946407 is a deficient number, since it is larger than the sum of its proper divisors (39323833).

78946407 is a wasteful number, since it uses less digits than its factorization.

78946407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804 (or 2795 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 78946407 is about 8885.1790640369. The cubic root of 78946407 is about 428.9869916345.

The spelling of 78946407 in words is "seventy-eight million, nine hundred forty-six thousand, four hundred seven".