31428348 has 48 divisors (see below), whose sum is σ = 84451584. Its totient is φ = 8910720.

The previous prime is 31428343. The next prime is 31428367. The reversal of 31428348 is 84382413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31428343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10143 + ... + 12873.

It is an arithmetic number, because the mean of its divisors is an integer number (1759408).

Almost surely, 2^31428348 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31428348, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42225792).

31428348 is an abundant number, since it is smaller than the sum of its proper divisors (53023236).

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

31428348 is a wasteful number, since it uses less digits than its factorization.

31428348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882 (or 2880 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 31428348 is about 5606.0991785733. The cubic root of 31428348 is about 315.5783378784.

The spelling of 31428348 in words is "thirty-one million, four hundred twenty-eight thousand, three hundred forty-eight".