31896642 has 8 divisors (see below), whose sum is σ = 63793296. Its totient is φ = 10632212.

The previous prime is 31896637. The next prime is 31896643. The reversal of 31896642 is 24669813.

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

31896642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 31896642.

It is not an unprimeable number, because it can be changed into a prime (31896643) 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, 2658048 + ... + 2658059.

It is an arithmetic number, because the mean of its divisors is an integer number (7974162).

Almost surely, 2^31896642 is an apocalyptic number.

31896642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31896642 is a wasteful number, since it uses less digits than its factorization.

31896642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5316112.

The product of its digits is 62208, while the sum is 39.

The square root of 31896642 is about 5647.7112178298. The cubic root of 31896642 is about 317.1380279738.

The spelling of 31896642 in words is "thirty-one million, eight hundred ninety-six thousand, six hundred forty-two".