78674157 has 12 divisors (see below), whose sum is σ = 113954880. Its totient is φ = 52304328.

The previous prime is 78674149. The next prime is 78674159. The reversal of 78674157 is 75147687.

It is not a de Polignac number, because 78674157 - 2³ = 78674149 is a prime.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (78674159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8607 + ... + 15212.

It is an arithmetic number, because the mean of its divisors is an integer number (9496240).

Almost surely, 2^78674157 is an apocalyptic number.

It is an amenable number.

78674157 is a deficient number, since it is larger than the sum of its proper divisors (35280723).

78674157 is a wasteful number, since it uses less digits than its factorization.

78674157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24192 (or 24189 counting only the distinct ones).

The product of its digits is 329280, while the sum is 45.

The square root of 78674157 is about 8869.8453763298. The cubic root of 78674157 is about 428.4932971379.

The spelling of 78674157 in words is "seventy-eight million, six hundred seventy-four thousand, one hundred fifty-seven".