31428746 has 8 divisors (see below), whose sum is σ = 47221380. Its totient is φ = 15688288.

The previous prime is 31428707. The next prime is 31428757. The reversal of 31428746 is 64782413.

It can be written as a sum of positive squares in 2 ways, for example, as 30680521 + 748225 = 5539^2 + 865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 in 3 ways as a sum of consecutive naturals, for example, 11501 + ... + 13968.

Almost surely, 2^31428746 is an apocalyptic number.

31428746 is a deficient number, since it is larger than the sum of its proper divisors (15792634).

31428746 is a wasteful number, since it uses less digits than its factorization.

31428746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26088.

The product of its digits is 32256, while the sum is 35.

The square root of 31428746 is about 5606.1346755140. The cubic root of 31428746 is about 315.5796700054.

The spelling of 31428746 in words is "thirty-one million, four hundred twenty-eight thousand, seven hundred forty-six".