31328148 has 12 divisors (see below), whose sum is σ = 73099040. Its totient is φ = 10442712.

The previous prime is 31328137. The next prime is 31328153. The reversal of 31328148 is 84182313.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×31328148³ (a number of 23 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 1305328 + ... + 1305351.

Almost surely, 2^31328148 is an apocalyptic number.

It is an amenable number.

31328148 is an abundant number, since it is smaller than the sum of its proper divisors (41770892).

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

31328148 is a wasteful number, since it uses less digits than its factorization.

31328148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610686 (or 2610684 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 31328148 is about 5597.1553489250. The cubic root of 31328148 is about 315.2426047394.

The spelling of 31328148 in words is "thirty-one million, three hundred twenty-eight thousand, one hundred forty-eight".