28724601 has 8 divisors (see below), whose sum is σ = 38335680. Its totient is φ = 19131632.

The previous prime is 28724581. The next prime is 28724603. The reversal of 28724601 is 10642782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28724601 - 2¹⁸ = 28462457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28724603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246 + ... + 7583.

It is an arithmetic number, because the mean of its divisors is an integer number (4791960).

Almost surely, 2^28724601 is an apocalyptic number.

It is an amenable number.

28724601 is a deficient number, since it is larger than the sum of its proper divisors (9611079).

28724601 is a wasteful number, since it uses less digits than its factorization.

28724601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9055.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28724601 is about 5359.5336550860. The cubic root of 28724601 is about 306.2560439735.

The spelling of 28724601 in words is "twenty-eight million, seven hundred twenty-four thousand, six hundred one".