78818378 has 16 divisors (see below), whose sum is σ = 125110656. Its totient is φ = 37163280.

The previous prime is 78818339. The next prime is 78818387. The reversal of 78818378 is 87381887.

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, 8801 + ... + 15332.

It is an arithmetic number, because the mean of its divisors is an integer number (7819416).

Almost surely, 2^78818378 is an apocalyptic number.

78818378 is a deficient number, since it is larger than the sum of its proper divisors (46292278).

78818378 is a wasteful number, since it uses less digits than its factorization.

78818378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24229.

The product of its digits is 602112, while the sum is 50.

The square root of 78818378 is about 8877.9715025449. The cubic root of 78818378 is about 428.7549671755.

The spelling of 78818378 in words is "seventy-eight million, eight hundred eighteen thousand, three hundred seventy-eight".