39978118 has 16 divisors (see below), whose sum is σ = 63638784. Its totient is φ = 18770560.

The previous prime is 39978097. The next prime is 39978121. The reversal of 39978118 is 81187993.

It is a congruent 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, 17883 + ... + 19993.

It is an arithmetic number, because the mean of its divisors is an integer number (3977424).

Almost surely, 2^39978118 is an apocalyptic number.

39978118 is a deficient number, since it is larger than the sum of its proper divisors (23660666).

39978118 is a wasteful number, since it uses less digits than its factorization.

39978118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2687.

The product of its digits is 108864, while the sum is 46.

The square root of 39978118 is about 6322.8251596893. The cubic root of 39978118 is about 341.9328151372.

The spelling of 39978118 in words is "thirty-nine million, nine hundred seventy-eight thousand, one hundred eighteen".