78842367 has 12 divisors (see below), whose sum is σ = 118835184. Its totient is φ = 50276160.

The previous prime is 78842339. The next prime is 78842371. The reversal of 78842367 is 76324887.

It is a happy number.

It is not a de Polignac number, because 78842367 - 2¹¹ = 78840319 is a prime.

It is a super-2 number, since 2×78842367² = 12432237668325378, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78842327) 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, 190234 + ... + 190647.

It is an arithmetic number, because the mean of its divisors is an integer number (9902932).

Almost surely, 2^78842367 is an apocalyptic number.

78842367 is a deficient number, since it is larger than the sum of its proper divisors (39992817).

78842367 is a wasteful number, since it uses less digits than its factorization.

78842367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380910 (or 380907 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 78842367 is about 8879.3224403667. The cubic root of 78842367 is about 428.7984610909.

The spelling of 78842367 in words is "seventy-eight million, eight hundred forty-two thousand, three hundred sixty-seven".