28729901 has 8 divisors (see below), whose sum is σ = 29850624. Its totient is φ = 27621360.

The previous prime is 28729853. The next prime is 28729903. The reversal of 28729901 is 10992782.

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 28729901 - 2²² = 24535597 is a prime.

It is a super-2 number, since 2×28729901² = 1650814422939602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28729903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1916 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (3731328).

Almost surely, 2^28729901 is an apocalyptic number.

It is an amenable number.

28729901 is a deficient number, since it is larger than the sum of its proper divisors (1120723).

28729901 is a wasteful number, since it uses less digits than its factorization.

28729901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6091.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 28729901 is about 5360.0280782847. The cubic root of 28729901 is about 306.2748786675.

The spelling of 28729901 in words is "twenty-eight million, seven hundred twenty-nine thousand, nine hundred one".