78314394 has 16 divisors (see below), whose sum is σ = 156733632. Its totient is φ = 26087328.

The previous prime is 78314389. The next prime is 78314441. The reversal of 78314394 is 49341387.

It is a super-2 number, since 2×78314394² = 12266288615174472, which contains 22 as substring.

It is a Curzon 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, 8067 + ... + 14889.

It is an arithmetic number, because the mean of its divisors is an integer number (9795852).

Almost surely, 2^78314394 is an apocalyptic number.

78314394 is an abundant number, since it is smaller than the sum of its proper divisors (78419238).

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

78314394 is a wasteful number, since it uses less digits than its factorization.

78314394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8741.

The product of its digits is 72576, while the sum is 39.

The square root of 78314394 is about 8849.5420220484. The cubic root of 78314394 is about 427.8391576898.

The spelling of 78314394 in words is "seventy-eight million, three hundred fourteen thousand, three hundred ninety-four".