31340432 has 10 divisors (see below), whose sum is σ = 60722118. Its totient is φ = 15670208.

The previous prime is 31340423. The next prime is 31340447. The reversal of 31340432 is 23404313.

It can be written as a sum of positive squares in only one way, i.e., 17172736 + 14167696 = 4144^2 + 3764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 979373 + ... + 979404.

Almost surely, 2^31340432 is an apocalyptic number.

It is an amenable number.

31340432 is a deficient number, since it is larger than the sum of its proper divisors (29381686).

31340432 is a wasteful number, since it uses less digits than its factorization.

31340432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958785 (or 1958779 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 31340432 is about 5598.2525845124. The cubic root of 31340432 is about 315.2838023458.

Adding to 31340432 its reverse (23404313), we get a palindrome (54744745).

The spelling of 31340432 in words is "thirty-one million, three hundred forty thousand, four hundred thirty-two".