31478142 has 16 divisors (see below), whose sum is σ = 63059472. Its totient is φ = 10475520.

The previous prime is 31478129. The next prime is 31478147. The reversal of 31478142 is 24187413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31478147) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3 + ... + 7934.

It is an arithmetic number, because the mean of its divisors is an integer number (3941217).

Almost surely, 2^31478142 is an apocalyptic number.

31478142 is an abundant number, since it is smaller than the sum of its proper divisors (31581330).

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

31478142 is a wasteful number, since it uses less digits than its factorization.

31478142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8603.

The product of its digits is 5376, while the sum is 30.

The square root of 31478142 is about 5610.5384768309. The cubic root of 31478142 is about 315.7449137799.

The spelling of 31478142 in words is "thirty-one million, four hundred seventy-eight thousand, one hundred forty-two".