78928412 has 12 divisors (see below), whose sum is σ = 140186760. Its totient is φ = 38875056.

The previous prime is 78928393. The next prime is 78928427. The reversal of 78928412 is 21482987.

It is a self number, because there is not a number n which added to its sum of digits gives 78928412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146987 + ... + 147522.

It is an arithmetic number, because the mean of its divisors is an integer number (11682230).

Almost surely, 2^78928412 is an apocalyptic number.

It is an amenable number.

78928412 is a deficient number, since it is larger than the sum of its proper divisors (61258348).

78928412 is a wasteful number, since it uses less digits than its factorization.

78928412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294580 (or 294578 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 78928412 is about 8884.1663649439. The cubic root of 78928412 is about 428.9543948058.

The spelling of 78928412 in words is "seventy-eight million, nine hundred twenty-eight thousand, four hundred twelve".