78838677 has 12 divisors (see below), whose sum is σ = 118096160. Its totient is φ = 52558956.

The previous prime is 78838637. The next prime is 78838709. The reversal of 78838677 is 77683887.

It is not a de Polignac number, because 78838677 - 2⁸ = 78838421 is a prime.

It is a super-2 number, since 2×78838677² = 12431073982220658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78838637) 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, 161977 + ... + 162462.

Almost surely, 2^78838677 is an apocalyptic number.

It is an amenable number.

78838677 is a deficient number, since it is larger than the sum of its proper divisors (39257483).

78838677 is an equidigital number, since it uses as much as digits as its factorization.

78838677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324454 (or 324442 counting only the distinct ones).

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

The square root of 78838677 is about 8879.1146518107. The cubic root of 78838677 is about 428.7917714093.

The spelling of 78838677 in words is "seventy-eight million, eight hundred thirty-eight thousand, six hundred seventy-seven".