78427074 has 16 divisors (see below), whose sum is σ = 171113760. Its totient is φ = 23765760.

The previous prime is 78427061. The next prime is 78427099. The reversal of 78427074 is 47072487.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 594079 + ... + 594210.

It is an arithmetic number, because the mean of its divisors is an integer number (10694610).

Almost surely, 2^78427074 is an apocalyptic number.

78427074 is an abundant number, since it is smaller than the sum of its proper divisors (92686686).

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

78427074 is a wasteful number, since it uses less digits than its factorization.

78427074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188305.

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 78427074 is about 8855.9061648145. The cubic root of 78427074 is about 428.0442532925.

The spelling of 78427074 in words is "seventy-eight million, four hundred twenty-seven thousand, seventy-four".