940639407 has 8 divisors (see below), whose sum is σ = 1259569584. Its totient is φ = 624401088.

The previous prime is 940639391. The next prime is 940639421. The reversal of 940639407 is 704936049.

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

It is not a de Polignac number, because 940639407 - 2⁴ = 940639391 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940639607) 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, 672148 + ... + 673545.

It is an arithmetic number, because the mean of its divisors is an integer number (157446198).

Almost surely, 2^940639407 is an apocalyptic number.

940639407 is a deficient number, since it is larger than the sum of its proper divisors (318930177).

940639407 is a wasteful number, since it uses less digits than its factorization.

940639407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345929.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 940639407 is about 30669.8452392574. The cubic root of 940639407 is about 979.8081697968.

The spelling of 940639407 in words is "nine hundred forty million, six hundred thirty-nine thousand, four hundred seven".