28280038 has 8 divisors (see below), whose sum is σ = 42574032. Its totient is φ = 14088696.

The previous prime is 28279997. The next prime is 28280047. The reversal of 28280038 is 83008282.

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 = 28279991 and 28280009.

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, 24970 + ... + 26077.

It is an arithmetic number, because the mean of its divisors is an integer number (5321754).

Almost surely, 2^28280038 is an apocalyptic number.

28280038 is a deficient number, since it is larger than the sum of its proper divisors (14293994).

28280038 is a wasteful number, since it uses less digits than its factorization.

28280038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51326.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28280038 is about 5317.8978929649. The cubic root of 28280038 is about 304.6678746053.

The spelling of 28280038 in words is "twenty-eight million, two hundred eighty thousand, thirty-eight".