31442260 has 12 divisors (see below), whose sum is σ = 66028788. Its totient is φ = 12576896.

The previous prime is 31442239. The next prime is 31442261. The reversal of 31442260 is 6224413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19909444 + 11532816 = 4462^2 + 3396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442261) 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, 786037 + ... + 786076.

It is an arithmetic number, because the mean of its divisors is an integer number (5502399).

Almost surely, 2^31442260 is an apocalyptic number.

It is an amenable number.

31442260 is an abundant number, since it is smaller than the sum of its proper divisors (34586528).

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

31442260 is a wasteful number, since it uses less digits than its factorization.

31442260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572122 (or 1572120 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 31442260 is about 5607.3398327549. The cubic root of 31442260 is about 315.6248954024.

Adding to 31442260 its reverse (6224413), we get a palindrome (37666673).

The spelling of 31442260 in words is "thirty-one million, four hundred forty-two thousand, two hundred sixty".