31494128 has 10 divisors (see below), whose sum is σ = 61019904. Its totient is φ = 15747056.

The previous prime is 31494119. The next prime is 31494143. The reversal of 31494128 is 82149413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31494094 and 31494103.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 984176 + ... + 984207.

Almost surely, 2^31494128 is an apocalyptic number.

It is an amenable number.

31494128 is a deficient number, since it is larger than the sum of its proper divisors (29525776).

31494128 is a wasteful number, since it uses less digits than its factorization.

31494128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968391 (or 1968385 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 31494128 is about 5611.9629364421. The cubic root of 31494128 is about 315.7983545027.

The spelling of 31494128 in words is "thirty-one million, four hundred ninety-four thousand, one hundred twenty-eight".