28707242 has 8 divisors (see below), whose sum is σ = 43086432. Its totient is φ = 14345100.

The previous prime is 28707229. The next prime is 28707251. The reversal of 28707242 is 24270782.

It is a happy number.

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 = 28707199 and 28707208.

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, 1517 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (5385804).

Almost surely, 2^28707242 is an apocalyptic number.

28707242 is a deficient number, since it is larger than the sum of its proper divisors (14379190).

28707242 is a wasteful number, since it uses less digits than its factorization.

28707242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 28707242 is about 5357.9139597422. The cubic root of 28707242 is about 306.1943387943.

The spelling of 28707242 in words is "twenty-eight million, seven hundred seven thousand, two hundred forty-two".