28801549 has 8 divisors (see below), whose sum is σ = 34648640. Its totient is φ = 23387616.

The previous prime is 28801547. The next prime is 28801603. The reversal of 28801549 is 94510882.

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

It is not a de Polignac number, because 28801549 - 2¹ = 28801547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28801541) 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, 108144 + ... + 108409.

It is an arithmetic number, because the mean of its divisors is an integer number (4331080).

Almost surely, 2^28801549 is an apocalyptic number.

It is an amenable number.

28801549 is a deficient number, since it is larger than the sum of its proper divisors (5847091).

28801549 is a wasteful number, since it uses less digits than its factorization.

28801549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216579.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 28801549 is about 5366.7074636130. The cubic root of 28801549 is about 306.5292682909.

The spelling of 28801549 in words is "twenty-eight million, eight hundred one thousand, five hundred forty-nine".