78595978 has 8 divisors (see below), whose sum is σ = 119061540. Its totient is φ = 38908800.

The previous prime is 78595973. The next prime is 78596009. The reversal of 78595978 is 87959587.

It can be written as a sum of positive squares in 2 ways, for example, as 73564929 + 5031049 = 8577^2 + 2243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78595973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194343 + ... + 194746.

Almost surely, 2^78595978 is an apocalyptic number.

78595978 is a deficient number, since it is larger than the sum of its proper divisors (40465562).

78595978 is a wasteful number, since it uses less digits than its factorization.

78595978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389192.

The product of its digits is 6350400, while the sum is 58.

The square root of 78595978 is about 8865.4372706596. The cubic root of 78595978 is about 428.3513179460.

The spelling of 78595978 in words is "seventy-eight million, five hundred ninety-five thousand, nine hundred seventy-eight".