28729599 has 16 divisors (see below), whose sum is σ = 40165632. Its totient is φ = 18231488.

The previous prime is 28729583. The next prime is 28729601. The reversal of 28729599 is 99592782.

It is a Cunningham number, because it is equal to 5360²-1.

It is a cyclic number.

It is not a de Polignac number, because 28729599 - 2⁴ = 28729583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28729199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15184 + ... + 16970.

It is an arithmetic number, because the mean of its divisors is an integer number (2510352).

Almost surely, 2^28729599 is an apocalyptic number.

28729599 is a deficient number, since it is larger than the sum of its proper divisors (11436033).

28729599 is a wasteful number, since it uses less digits than its factorization.

28729599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046.

The product of its digits is 816480, while the sum is 51.

The square root of 28729599 is about 5359.9999067164. Note that the first 4 decimals coincide. The cubic root of 28729599 is about 306.2738055075.

The spelling of 28729599 in words is "twenty-eight million, seven hundred twenty-nine thousand, five hundred ninety-nine".