28499403 has 8 divisors (see below), whose sum is σ = 38023888. Its totient is φ = 18987264.

The previous prime is 28499389. The next prime is 28499407. The reversal of 28499403 is 30499482.

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

It is not a de Polignac number, because 28499403 - 2⁸ = 28499147 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 7 ways as a sum of consecutive naturals, for example, 7251 + ... + 10467.

It is an arithmetic number, because the mean of its divisors is an integer number (4752986).

Almost surely, 2^28499403 is an apocalyptic number.

28499403 is a deficient number, since it is larger than the sum of its proper divisors (9524485).

28499403 is a wasteful number, since it uses less digits than its factorization.

28499403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28499403 is about 5338.4832115499. The cubic root of 28499403 is about 305.4536043683.

The spelling of 28499403 in words is "twenty-eight million, four hundred ninety-nine thousand, four hundred three".