28783242 has 32 divisors (see below), whose sum is σ = 64162560. Its totient is φ = 9564480.

The previous prime is 28783219. The next prime is 28783301. The reversal of 28783242 is 24238782.

It is a junction number, because it is equal to n+sod(n) for n = 28783197 and 28783206.

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, 22767 + ... + 23997.

It is an arithmetic number, because the mean of its divisors is an integer number (2005080).

Almost surely, 2^28783242 is an apocalyptic number.

28783242 is an abundant number, since it is smaller than the sum of its proper divisors (35379318).

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

28783242 is a wasteful number, since it uses less digits than its factorization.

28783242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 1669 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 28783242 is about 5365.0015843427. The cubic root of 28783242 is about 306.4643085822.

The spelling of 28783242 in words is "twenty-eight million, seven hundred eighty-three thousand, two hundred forty-two".