39290381 has 8 divisors (see below), whose sum is σ = 42423864. Its totient is φ = 36172800.

The previous prime is 39290353. The next prime is 39290387. The reversal of 39290381 is 18309293.

It can be written as a sum of positive squares in 4 ways, for example, as 9205156 + 30085225 = 3034^2 + 5485^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39290381 - 2²² = 35096077 is a prime.

It is a super-2 number, since 2×39290381² = 3087468078250322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39290387) 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, 1445 + ... + 8981.

It is an arithmetic number, because the mean of its divisors is an integer number (5302983).

Almost surely, 2^39290381 is an apocalyptic number.

It is an amenable number.

39290381 is a deficient number, since it is larger than the sum of its proper divisors (3133483).

39290381 is a wasteful number, since it uses less digits than its factorization.

39290381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7951.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 39290381 is about 6268.2039692403. The cubic root of 39290381 is about 339.9607249904.

The spelling of 39290381 in words is "thirty-nine million, two hundred ninety thousand, three hundred eighty-one".