78678992 has 120 divisors (see below), whose sum is σ = 195041088. Its totient is φ = 29998080.

The previous prime is 78678989. The next prime is 78679033. The reversal of 78678992 is 29987687.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1829723 + ... + 1829765.

Almost surely, 2^78678992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78678992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97520544).

78678992 is an abundant number, since it is smaller than the sum of its proper divisors (116362096).

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

78678992 is a wasteful number, since it uses less digits than its factorization.

78678992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 100 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The square root of 78678992 is about 8870.1179248080. The cubic root of 78678992 is about 428.5020747880.

The spelling of 78678992 in words is "seventy-eight million, six hundred seventy-eight thousand, nine hundred ninety-two".