28242838 has 8 divisors (see below), whose sum is σ = 45623088. Its totient is φ = 13035144.

The previous prime is 28242791. The next prime is 28242859. The reversal of 28242838 is 83824282.

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

It is a junction number, because it is equal to n+sod(n) for n = 28242797 and 28242806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543106 + ... + 543157.

It is an arithmetic number, because the mean of its divisors is an integer number (5702886).

Almost surely, 2^28242838 is an apocalyptic number.

28242838 is a deficient number, since it is larger than the sum of its proper divisors (17380250).

28242838 is a wasteful number, since it uses less digits than its factorization.

28242838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086278.

The product of its digits is 49152, while the sum is 37.

The square root of 28242838 is about 5314.3991193737. The cubic root of 28242838 is about 304.5342277074.

The spelling of 28242838 in words is "twenty-eight million, two hundred forty-two thousand, eight hundred thirty-eight".