78579278 has 4 divisors (see below), whose sum is σ = 117868920. Its totient is φ = 39289638.

The previous prime is 78579271. The next prime is 78579283. The reversal of 78579278 is 87297587.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78579271) by changing a digit.

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 as a sum of consecutive naturals, namely, 19644818 + ... + 19644821.

It is an arithmetic number, because the mean of its divisors is an integer number (29467230).

Almost surely, 2^78579278 is an apocalyptic number.

78579278 is a deficient number, since it is larger than the sum of its proper divisors (39289642).

78579278 is a wasteful number, since it uses less digits than its factorization.

78579278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39289641.

The product of its digits is 1975680, while the sum is 53.

The square root of 78579278 is about 8864.4953607072. The cubic root of 78579278 is about 428.3209772343.

The spelling of 78579278 in words is "seventy-eight million, five hundred seventy-nine thousand, two hundred seventy-eight".