31448228 has 12 divisors (see below), whose sum is σ = 62896512. Its totient is φ = 13477800.

The previous prime is 31448201. The next prime is 31448233. The reversal of 31448228 is 82284413.

31448228 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 31448194 and 31448203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561548 + ... + 561603.

It is an arithmetic number, because the mean of its divisors is an integer number (5241376).

Almost surely, 2^31448228 is an apocalyptic number.

It is an amenable number.

31448228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31448228 is a wasteful number, since it uses less digits than its factorization.

31448228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123162 (or 1123160 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 31448228 is about 5607.8719671547. The cubic root of 31448228 is about 315.6448635409.

The spelling of 31448228 in words is "thirty-one million, four hundred forty-eight thousand, two hundred twenty-eight".