31889245 has 8 divisors (see below), whose sum is σ = 38341080. Its totient is φ = 25462080.

The previous prime is 31889243. The next prime is 31889257. The reversal of 31889245 is 54298813.

It can be written as a sum of positive squares in 4 ways, for example, as 45796 + 31843449 = 214^2 + 5643^2 .

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

It is not a de Polignac number, because 31889245 - 2¹ = 31889243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31889198 and 31889207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31889243) 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, 3190 + ... + 8599.

It is an arithmetic number, because the mean of its divisors is an integer number (4792635).

Almost surely, 2^31889245 is an apocalyptic number.

It is an amenable number.

31889245 is a deficient number, since it is larger than the sum of its proper divisors (6451835).

31889245 is a wasteful number, since it uses less digits than its factorization.

31889245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12335.

The product of its digits is 69120, while the sum is 40.

The square root of 31889245 is about 5647.0563128058. The cubic root of 31889245 is about 317.1135107498.

The spelling of 31889245 in words is "thirty-one million, eight hundred eighty-nine thousand, two hundred forty-five".