78378718 has 12 divisors (see below), whose sum is σ = 129228120. Its totient is φ = 35626580.

The previous prime is 78378709. The next prime is 78378731. The reversal of 78378718 is 81787387.

It is a super-2 number, since 2×78378718² = 12286446870647048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161698 + ... + 162181.

It is an arithmetic number, because the mean of its divisors is an integer number (10769010).

Almost surely, 2^78378718 is an apocalyptic number.

78378718 is a deficient number, since it is larger than the sum of its proper divisors (50849402).

78378718 is a wasteful number, since it uses less digits than its factorization.

78378718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323903 (or 323892 counting only the distinct ones).

The product of its digits is 526848, while the sum is 49.

The square root of 78378718 is about 8853.1755884541. The cubic root of 78378718 is about 427.9562617255.

The spelling of 78378718 in words is "seventy-eight million, three hundred seventy-eight thousand, seven hundred eighteen".