938940309 has 32 divisors (see below), whose sum is σ = 1479408000. Its totient is φ = 586870272.

The previous prime is 938940283. The next prime is 938940319. The reversal of 938940309 is 903049839.

It is not a de Polignac number, because 938940309 - 2⁷ = 938940181 is a prime.

It is a super-3 number, since 3×938940309³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938940319) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40327 + ... + 59195.

It is an arithmetic number, because the mean of its divisors is an integer number (46231500).

Almost surely, 2^938940309 is an apocalyptic number.

It is an amenable number.

938940309 is a deficient number, since it is larger than the sum of its proper divisors (540467691).

938940309 is a wasteful number, since it uses less digits than its factorization.

938940309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18994 (or 18988 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 938940309 is about 30642.1329055273. The cubic root of 938940309 is about 979.2178644226.

The spelling of 938940309 in words is "nine hundred thirty-eight million, nine hundred forty thousand, three hundred nine".