28431082 has 16 divisors (see below), whose sum is σ = 44779392. Its totient is φ = 13512400.

The previous prime is 28431079. The next prime is 28431083. The reversal of 28431082 is 28013482.

It is a self number, because there is not a number n which added to its sum of digits gives 28431082.

It is not an unprimeable number, because it can be changed into a prime (28431083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5832 + ... + 9532.

It is an arithmetic number, because the mean of its divisors is an integer number (2798712).

Almost surely, 2^28431082 is an apocalyptic number.

28431082 is a deficient number, since it is larger than the sum of its proper divisors (16348310).

28431082 is a wasteful number, since it uses less digits than its factorization.

28431082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28431082 is about 5332.0804570074. The cubic root of 28431082 is about 305.2093232965.

It can be divided in two parts, 284 and 31082, that multiplied together give a palindrome (8827288).

The spelling of 28431082 in words is "twenty-eight million, four hundred thirty-one thousand, eighty-two".