78094018 has 4 divisors (see below), whose sum is σ = 117141030. Its totient is φ = 39047008.

The previous prime is 78094007. The next prime is 78094019. The reversal of 78094018 is 81049087.

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

It can be written as a sum of positive squares in only one way, i.e., 76685049 + 1408969 = 8757^2 + 1187^2 .

It is not an unprimeable number, because it can be changed into a prime (78094019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19523503 + ... + 19523506.

Almost surely, 2^78094018 is an apocalyptic number.

78094018 is a deficient number, since it is larger than the sum of its proper divisors (39047012).

78094018 is a wasteful number, since it uses less digits than its factorization.

78094018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39047011.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 78094018 is about 8837.0819844562. The cubic root of 78094018 is about 427.4374688243.

It can be divided in two parts, 7 and 8094018, that added together give a square (8094025 = 2845²).

The spelling of 78094018 in words is "seventy-eight million, ninety-four thousand, eighteen".