31869742 has 8 divisors (see below), whose sum is σ = 48278232. Its totient is φ = 15777000.

The previous prime is 31869737. The next prime is 31869749. The reversal of 31869742 is 24796813.

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

It is a junction number, because it is equal to n+sod(n) for n = 31869695 and 31869704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31869749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78684 + ... + 79087.

It is an arithmetic number, because the mean of its divisors is an integer number (6034779).

Almost surely, 2^31869742 is an apocalyptic number.

31869742 is a deficient number, since it is larger than the sum of its proper divisors (16408490).

31869742 is a wasteful number, since it uses less digits than its factorization.

31869742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157874.

The product of its digits is 72576, while the sum is 40.

The square root of 31869742 is about 5645.3292198064. The cubic root of 31869742 is about 317.0488502240.

The spelling of 31869742 in words is "thirty-one million, eight hundred sixty-nine thousand, seven hundred forty-two".