28607729 has 8 divisors (see below), whose sum is σ = 28956480. Its totient is φ = 28261296.

The previous prime is 28607723. The next prime is 28607737. The reversal of 28607729 is 92770682.

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 28607729 - 2¹² = 28603633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28607723) 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, 38132 + ... + 38874.

It is an arithmetic number, because the mean of its divisors is an integer number (3619560).

Almost surely, 2^28607729 is an apocalyptic number.

It is an amenable number.

28607729 is a deficient number, since it is larger than the sum of its proper divisors (348751).

28607729 is a wasteful number, since it uses less digits than its factorization.

28607729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 28607729 is about 5348.6193545624. The cubic root of 28607729 is about 305.8401239541.

The spelling of 28607729 in words is "twenty-eight million, six hundred seven thousand, seven hundred twenty-nine".