28499507 has 4 divisors (see below), whose sum is σ = 29738640. Its totient is φ = 27260376.

The previous prime is 28499479. The next prime is 28499539. The reversal of 28499507 is 70599482.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28499507 - 2¹⁴ = 28483123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28499407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619532 + ... + 619577.

It is an arithmetic number, because the mean of its divisors is an integer number (7434660).

Almost surely, 2^28499507 is an apocalyptic number.

28499507 is a deficient number, since it is larger than the sum of its proper divisors (1239133).

28499507 is a wasteful number, since it uses less digits than its factorization.

28499507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239132.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 28499507 is about 5338.4929521355. The cubic root of 28499507 is about 305.4539759215.

The spelling of 28499507 in words is "twenty-eight million, four hundred ninety-nine thousand, five hundred seven".