31428886 has 16 divisors (see below), whose sum is σ = 50552640. Its totient is φ = 14601600.

The previous prime is 31428857. The next prime is 31428893. The reversal of 31428886 is 68882413.

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, 3165 + ... + 8536.

It is an arithmetic number, because the mean of its divisors is an integer number (3159540).

Almost surely, 2^31428886 is an apocalyptic number.

31428886 is a deficient number, since it is larger than the sum of its proper divisors (19123754).

31428886 is a wasteful number, since it uses less digits than its factorization.

31428886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11799.

The product of its digits is 73728, while the sum is 40.

The square root of 31428886 is about 5606.1471618216. The cubic root of 31428886 is about 315.5801385901.

The spelling of 31428886 in words is "thirty-one million, four hundred twenty-eight thousand, eight hundred eighty-six".