28704542 has 8 divisors (see below), whose sum is σ = 43699656. Its totient is φ = 14137992.

The previous prime is 28704541. The next prime is 28704553. The reversal of 28704542 is 24540782.

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 = 28704499 and 28704508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106973 + ... + 107240.

It is an arithmetic number, because the mean of its divisors is an integer number (5462457).

Almost surely, 2^28704542 is an apocalyptic number.

28704542 is a deficient number, since it is larger than the sum of its proper divisors (14995114).

28704542 is a wasteful number, since it uses less digits than its factorization.

28704542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214282.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 28704542 is about 5357.6619900849. The cubic root of 28704542 is about 306.1847390026.

The spelling of 28704542 in words is "twenty-eight million, seven hundred four thousand, five hundred forty-two".