78078012 has 24 divisors (see below), whose sum is σ = 182990976. Its totient is φ = 25910448.

The previous prime is 78077999. The next prime is 78078041. The reversal of 78078012 is 21087087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11608 + ... + 17055.

It is an arithmetic number, because the mean of its divisors is an integer number (7624624).

Almost surely, 2^78078012 is an apocalyptic number.

It is an amenable number.

78078012 is an abundant number, since it is smaller than the sum of its proper divisors (104912964).

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

78078012 is a wasteful number, since it uses less digits than its factorization.

78078012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28897 (or 28895 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 78078012 is about 8836.1763223693. The cubic root of 78078012 is about 427.4082645747.

The spelling of 78078012 in words is "seventy-eight million, seventy-eight thousand, twelve".