28409542 has 16 divisors (see below), whose sum is σ = 49151520. Its totient is φ = 12063168.

The previous prime is 28409509. The next prime is 28409569. The reversal of 28409542 is 24590482.

It is a junction number, because it is equal to n+sod(n) for n = 28409498 and 28409507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7783 + ... + 10834.

It is an arithmetic number, because the mean of its divisors is an integer number (3071970).

Almost surely, 2^28409542 is an apocalyptic number.

28409542 is a deficient number, since it is larger than the sum of its proper divisors (20741978).

28409542 is a wasteful number, since it uses less digits than its factorization.

28409542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18735.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 28409542 is about 5330.0602248005. The cubic root of 28409542 is about 305.1322261043.

The spelling of 28409542 in words is "twenty-eight million, four hundred nine thousand, five hundred forty-two".