39381813 has 12 divisors (see below), whose sum is σ = 59879040. Its totient is φ = 24872616.

The previous prime is 39381803. The next prime is 39381829. The reversal of 39381813 is 31818393.

It is not a de Polignac number, because 39381813 - 2⁹ = 39381301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39381803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114981 + ... + 115322.

It is an arithmetic number, because the mean of its divisors is an integer number (4989920).

Almost surely, 2^39381813 is an apocalyptic number.

It is an amenable number.

39381813 is a deficient number, since it is larger than the sum of its proper divisors (20497227).

39381813 is a wasteful number, since it uses less digits than its factorization.

39381813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230328 (or 230325 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 39381813 is about 6275.4930483588. The cubic root of 39381813 is about 340.2242263717.

The spelling of 39381813 in words is "thirty-nine million, three hundred eighty-one thousand, eight hundred thirteen".