78939072 has 84 divisors (see below), whose sum is σ = 238206280. Its totient is φ = 24924672.

The previous prime is 78939067. The next prime is 78939103. The reversal of 78939072 is 27093987.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7338 + ... + 14550.

Almost surely, 2^78939072 is an apocalyptic number.

78939072 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 78939072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119103140).

78939072 is an abundant number, since it is smaller than the sum of its proper divisors (159267208).

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

78939072 is a wasteful number, since it uses less digits than its factorization.

78939072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250 (or 7237 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 78939072 is about 8884.7662884288. The cubic root of 78939072 is about 428.9737053341.

The spelling of 78939072 in words is "seventy-eight million, nine hundred thirty-nine thousand, seventy-two".