39938390 has 8 divisors (see below), whose sum is σ = 71889120. Its totient is φ = 15975352.

The previous prime is 39938369. The next prime is 39938411. The reversal of 39938390 is 9383993.

It is an interprime number because it is at equal distance from previous prime (39938369) and next prime (39938411).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996910 + ... + 1996929.

It is an arithmetic number, because the mean of its divisors is an integer number (8986140).

Almost surely, 2^39938390 is an apocalyptic number.

39938390 is a deficient number, since it is larger than the sum of its proper divisors (31950730).

39938390 is a wasteful number, since it uses less digits than its factorization.

39938390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993846.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 39938390 is about 6319.6827452017. The cubic root of 39938390 is about 341.8195130792.

The spelling of 39938390 in words is "thirty-nine million, nine hundred thirty-eight thousand, three hundred ninety".