31728348 has 30 divisors (see below), whose sum is σ = 82945016. Its totient is φ = 10576008.

The previous prime is 31728343. The next prime is 31728353. The reversal of 31728348 is 84382713.

It is an interprime number because it is at equal distance from previous prime (31728343) and next prime (31728353).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31728343) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48640 + ... + 49287.

Almost surely, 2^31728348 is an apocalyptic number.

It is an amenable number.

31728348 is an abundant number, since it is smaller than the sum of its proper divisors (51216668).

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

31728348 is a wasteful number, since it uses less digits than its factorization.

31728348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97943 (or 97932 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 31728348 is about 5632.7922028067. The cubic root of 31728348 is about 316.5792797960.

The spelling of 31728348 in words is "thirty-one million, seven hundred twenty-eight thousand, three hundred forty-eight".