39540818 has 16 divisors (see below), whose sum is σ = 63210240. Its totient is φ = 18507456.

The previous prime is 39540811. The next prime is 39540821. The reversal of 39540818 is 81804593.

It is not an unprimeable number, because it can be changed into a prime (39540811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6983 + ... + 11306.

It is an arithmetic number, because the mean of its divisors is an integer number (3950640).

Almost surely, 2^39540818 is an apocalyptic number.

39540818 is a deficient number, since it is larger than the sum of its proper divisors (23669422).

39540818 is a wasteful number, since it uses less digits than its factorization.

39540818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18361.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 39540818 is about 6288.1490122293. The cubic root of 39540818 is about 340.6814992889.

The spelling of 39540818 in words is "thirty-nine million, five hundred forty thousand, eight hundred eighteen".