78860146 has 24 divisors (see below), whose sum is σ = 130198320. Its totient is φ = 35721576.

The previous prime is 78860143. The next prime is 78860149. The reversal of 78860146 is 64106887.

It is an interprime number because it is at equal distance from previous prime (78860143) and next prime (78860149).

It is a junction number, because it is equal to n+sod(n) for n = 78860099 and 78860108.

It is not an unprimeable number, because it can be changed into a prime (78860143) 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, 18141 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (5424930).

Almost surely, 2^78860146 is an apocalyptic number.

78860146 is a deficient number, since it is larger than the sum of its proper divisors (51338174).

78860146 is a wasteful number, since it uses less digits than its factorization.

78860146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3990 (or 3967 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 78860146 is about 8880.3235301424. The cubic root of 78860146 is about 428.8306901033.

The spelling of 78860146 in words is "seventy-eight million, eight hundred sixty thousand, one hundred forty-six".