28819542 has 32 divisors (see below), whose sum is σ = 61297920. Its totient is φ = 9007200.

The previous prime is 28819519. The next prime is 28819577. The reversal of 28819542 is 24591882.

It is a self number, because there is not a number n which added to its sum of digits gives 28819542.

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 in 15 ways as a sum of consecutive naturals, for example, 10263 + ... + 12765.

It is an arithmetic number, because the mean of its divisors is an integer number (1915560).

Almost surely, 2^28819542 is an apocalyptic number.

28819542 is an abundant number, since it is smaller than the sum of its proper divisors (32478378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28819542 is a wasteful number, since it uses less digits than its factorization.

28819542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628.

The product of its digits is 46080, while the sum is 39.

The square root of 28819542 is about 5368.3835555966. The cubic root of 28819542 is about 306.5930869996.

The spelling of 28819542 in words is "twenty-eight million, eight hundred nineteen thousand, five hundred forty-two".