31478469 has 16 divisors (see below), whose sum is σ = 45887040. Its totient is φ = 19036160.

The previous prime is 31478429. The next prime is 31478471. The reversal of 31478469 is 96487413.

It is not a de Polignac number, because 31478469 - 2⁷ = 31478341 is a prime.

It is a super-2 number, since 2×31478469² = 1981788021167922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31478469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31478429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21637 + ... + 23045.

It is an arithmetic number, because the mean of its divisors is an integer number (2867940).

Almost surely, 2^31478469 is an apocalyptic number.

It is an amenable number.

31478469 is a deficient number, since it is larger than the sum of its proper divisors (14408571).

31478469 is a wasteful number, since it uses less digits than its factorization.

31478469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100.

The product of its digits is 145152, while the sum is 42.

The square root of 31478469 is about 5610.5676183431. The cubic root of 31478469 is about 315.7460071124.

The spelling of 31478469 in words is "thirty-one million, four hundred seventy-eight thousand, four hundred sixty-nine".