78837678 has 16 divisors (see below), whose sum is σ = 175194960. Its totient is φ = 26279208.

The previous prime is 78837677. The next prime is 78837679. The reversal of 78837678 is 87673887.

It is an interprime number because it is at equal distance from previous prime (78837677) and next prime (78837679).

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1459957 = 78837678 / (7 + 8 + 8 + 3 + 7 + 6 + 7 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78837673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 729925 + ... + 730032.

It is an arithmetic number, because the mean of its divisors is an integer number (10949685).

Almost surely, 2^78837678 is an apocalyptic number.

78837678 is an abundant number, since it is smaller than the sum of its proper divisors (96357282).

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

78837678 is a wasteful number, since it uses less digits than its factorization.

78837678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459968 (or 1459962 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 78837678 is about 8879.0583960238. The cubic root of 78837678 is about 428.7899602644.

The spelling of 78837678 in words is "seventy-eight million, eight hundred thirty-seven thousand, six hundred seventy-eight".