28999407 has 8 divisors (see below), whose sum is σ = 38806576. Its totient is φ = 19262592.

The previous prime is 28999403. The next prime is 28999417. The reversal of 28999407 is 70499982.

It is a happy number.

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

It is not a de Polignac number, because 28999407 - 2² = 28999403 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 (28999403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16618 + ... + 18279.

It is an arithmetic number, because the mean of its divisors is an integer number (4850822).

Almost surely, 2^28999407 is an apocalyptic number.

28999407 is a deficient number, since it is larger than the sum of its proper divisors (9807169).

28999407 is a wasteful number, since it uses less digits than its factorization.

28999407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35177.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 28999407 is about 5385.1097481853. The cubic root of 28999407 is about 307.2295884349.

The spelling of 28999407 in words is "twenty-eight million, nine hundred ninety-nine thousand, four hundred seven".