78367912 has 16 divisors (see below), whose sum is σ = 167931360. Its totient is φ = 33586224.

The previous prime is 78367879. The next prime is 78367937. The reversal of 78367912 is 21976387.

It is a happy number.

It is a super-2 number, since 2×78367912² = 12283059262479488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699658 + ... + 699769.

It is an arithmetic number, because the mean of its divisors is an integer number (10495710).

Almost surely, 2^78367912 is an apocalyptic number.

It is an amenable number.

78367912 is an abundant number, since it is smaller than the sum of its proper divisors (89563448).

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

78367912 is a wasteful number, since it uses less digits than its factorization.

78367912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399440 (or 1399436 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 78367912 is about 8852.5652779293. The cubic root of 78367912 is about 427.9365935127.

The spelling of 78367912 in words is "seventy-eight million, three hundred sixty-seven thousand, nine hundred twelve".