31438845 has 12 divisors (see below), whose sum is σ = 54494076. Its totient is φ = 16767360.

The previous prime is 31438843. The next prime is 31438853. The reversal of 31438845 is 54883413.

It can be written as a sum of positive squares in 2 ways, for example, as 16088121 + 15350724 = 4011^2 + 3918^2 .

It is not a de Polignac number, because 31438845 - 2¹ = 31438843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31438843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349276 + ... + 349365.

It is an arithmetic number, because the mean of its divisors is an integer number (4541173).

Almost surely, 2^31438845 is an apocalyptic number.

It is an amenable number.

31438845 is a deficient number, since it is larger than the sum of its proper divisors (23055231).

31438845 is a wasteful number, since it uses less digits than its factorization.

31438845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698652 (or 698649 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 31438845 is about 5607.0353128904. The cubic root of 31438845 is about 315.6134681275.

The spelling of 31438845 in words is "thirty-one million, four hundred thirty-eight thousand, eight hundred forty-five".