39442631 has 8 divisors (see below), whose sum is σ = 41537760. Its totient is φ = 37379232.

The previous prime is 39442619. The next prime is 39442643. The reversal of 39442631 is 13624493.

It is an interprime number because it is at equal distance from previous prime (39442619) and next prime (39442643).

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

It is a de Polignac number, because none of the positive numbers 2^k-39442631 is a prime.

It is a super-2 number, since 2×39442631² = 3111442280404322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39442681) 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, 5360 + ... + 10373.

It is an arithmetic number, because the mean of its divisors is an integer number (5192220).

Almost surely, 2^39442631 is an apocalyptic number.

39442631 is a deficient number, since it is larger than the sum of its proper divisors (2095129).

39442631 is a wasteful number, since it uses less digits than its factorization.

39442631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15865.

The product of its digits is 15552, while the sum is 32.

The square root of 39442631 is about 6280.3368540230. The cubic root of 39442631 is about 340.3992743021.

The spelling of 39442631 in words is "thirty-nine million, four hundred forty-two thousand, six hundred thirty-one".