31478112 has 48 divisors (see below), whose sum is σ = 91813680. Its totient is φ = 10492416.

The previous prime is 31478089. The next prime is 31478129. The reversal of 31478112 is 21187413.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17353 + ... + 19080.

It is an arithmetic number, because the mean of its divisors is an integer number (1912785).

Almost surely, 2^31478112 is an apocalyptic number.

31478112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31478112 is an abundant number, since it is smaller than the sum of its proper divisors (60335568).

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

31478112 is a wasteful number, since it uses less digits than its factorization.

31478112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36452 (or 36438 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 31478112 is about 5610.5358032901. The cubic root of 31478112 is about 315.7448134737.

The spelling of 31478112 in words is "thirty-one million, four hundred seventy-eight thousand, one hundred twelve".