31270072 has 32 divisors (see below), whose sum is σ = 64091520. Its totient is φ = 14238720.

The previous prime is 31270049. The next prime is 31270081. The reversal of 31270072 is 27007213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508 + ... + 7924.

It is an arithmetic number, because the mean of its divisors is an integer number (2002860).

Almost surely, 2^31270072 is an apocalyptic number.

It is an amenable number.

31270072 is an abundant number, since it is smaller than the sum of its proper divisors (32821448).

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

31270072 is a wasteful number, since it uses less digits than its factorization.

31270072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7471 (or 7467 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 31270072 is about 5591.9649498186. The cubic root of 31270072 is about 315.0476857345.

Adding to 31270072 its reverse (27007213), we get a palindrome (58277285).

The spelling of 31270072 in words is "thirty-one million, two hundred seventy thousand, seventy-two".