31367712 has 48 divisors (see below), whose sum is σ = 84575232. Its totient is φ = 10172160.

The previous prime is 31367681. The next prime is 31367717. The reversal of 31367712 is 21776313.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×31367712² = 1967866712229888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31367712.

It is not an unprimeable number, because it can be changed into a prime (31367717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864 + ... + 7967.

It is an arithmetic number, because the mean of its divisors is an integer number (1761984).

Almost surely, 2^31367712 is an apocalyptic number.

31367712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31367712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42287616).

31367712 is an abundant number, since it is smaller than the sum of its proper divisors (53207520).

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

31367712 is a wasteful number, since it uses less digits than its factorization.

31367712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8881 (or 8873 counting only the distinct ones).

The product of its digits is 5292, while the sum is 30.

The square root of 31367712 is about 5600.6885291007. The cubic root of 31367712 is about 315.3752544759.

The spelling of 31367712 in words is "thirty-one million, three hundred sixty-seven thousand, seven hundred twelve".