31672072 has 32 divisors (see below), whose sum is σ = 60725880. Its totient is φ = 15482880.

The previous prime is 31672063. The next prime is 31672073. The reversal of 31672072 is 27027613.

It can be written as a sum of positive squares in 4 ways, for example, as 26770276 + 4901796 = 5174^2 + 2214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31672072.

It is not an unprimeable number, because it can be changed into a prime (31672073) 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, 112572 + ... + 112852.

Almost surely, 2^31672072 is an apocalyptic number.

It is an amenable number.

31672072 is a deficient number, since it is larger than the sum of its proper divisors (29053808).

31672072 is a wasteful number, since it uses less digits than its factorization.

31672072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 31672072 is about 5627.7945946880. The cubic root of 31672072 is about 316.3919987023.

Adding to 31672072 its reverse (27027613), we get a palindrome (58699685).

The spelling of 31672072 in words is "thirty-one million, six hundred seventy-two thousand, seventy-two".