28238499 has 6 divisors (see below), whose sum is σ = 40788956. Its totient is φ = 18825660.

The previous prime is 28238447. The next prime is 28238519. The reversal of 28238499 is 99483282.

It is not a de Polignac number, because 28238499 - 2⁹ = 28237987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28238429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1568797 + ... + 1568814.

Almost surely, 2^28238499 is an apocalyptic number.

28238499 is a deficient number, since it is larger than the sum of its proper divisors (12550457).

28238499 is a wasteful number, since it uses less digits than its factorization.

28238499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137617 (or 3137614 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 28238499 is about 5313.9908731574. The cubic root of 28238499 is about 304.5186315211.

It can be divided in two parts, 282 and 38499, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 28238499 in words is "twenty-eight million, two hundred thirty-eight thousand, four hundred ninety-nine".