31799439 has 32 divisors (see below), whose sum is σ = 54113280. Its totient is φ = 18079200.

The previous prime is 31799429. The next prime is 31799497. The reversal of 31799439 is 93499713.

It is not a de Polignac number, because 31799439 - 2⁴ = 31799423 is a prime.

It is a super-2 number, since 2×31799439² = 2022408641429442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31799394 and 31799403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31799419) 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, 58509 + ... + 59049.

It is an arithmetic number, because the mean of its divisors is an integer number (1691040).

Almost surely, 2^31799439 is an apocalyptic number.

31799439 is a deficient number, since it is larger than the sum of its proper divisors (22313841).

31799439 is a wasteful number, since it uses less digits than its factorization.

31799439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 862 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 31799439 is about 5639.0991301803. The cubic root of 31799439 is about 316.8155474750.

The spelling of 31799439 in words is "thirty-one million, seven hundred ninety-nine thousand, four hundred thirty-nine".