78774192 has 120 divisors (see below), whose sum is σ = 266831136. Its totient is φ = 21178368.

The previous prime is 78774181. The next prime is 78774211. The reversal of 78774192 is 29147787.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14838 + ... + 19434.

Almost surely, 2^78774192 is an apocalyptic number.

78774192 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78774192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133415568).

78774192 is an abundant number, since it is smaller than the sum of its proper divisors (188056944).

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

78774192 is a wasteful number, since it uses less digits than its factorization.

78774192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635 (or 4626 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 78774192 is about 8875.4826347642. The cubic root of 78774192 is about 428.6748314306.

The spelling of 78774192 in words is "seventy-eight million, seven hundred seventy-four thousand, one hundred ninety-two".