28243942 has 8 divisors (see below), whose sum is σ = 42962832. Its totient is φ = 13923000.

The previous prime is 28243927. The next prime is 28243951. The reversal of 28243942 is 24934282.

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 = 28243898 and 28243907.

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, 99309 + ... + 99592.

It is an arithmetic number, because the mean of its divisors is an integer number (5370354).

Almost surely, 2^28243942 is an apocalyptic number.

28243942 is a deficient number, since it is larger than the sum of its proper divisors (14718890).

28243942 is a wasteful number, since it uses less digits than its factorization.

28243942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198974.

The product of its digits is 27648, while the sum is 34.

The square root of 28243942 is about 5314.5029871099. The cubic root of 28243942 is about 304.5381956916.

The spelling of 28243942 in words is "twenty-eight million, two hundred forty-three thousand, nine hundred forty-two".