28242499 has 2 divisors, whose sum is σ = 28242500. Its totient is φ = 28242498.

The previous prime is 28242479. The next prime is 28242517. The reversal of 28242499 is 99424282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28242499 - 2⁷ = 28242371 is a prime.

It is not a weakly prime, because it can be changed into another prime (28242449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14121249 + 14121250.

It is an arithmetic number, because the mean of its divisors is an integer number (14121250).

Almost surely, 2^28242499 is an apocalyptic number.

28242499 is a deficient number, since it is larger than the sum of its proper divisors (1).

28242499 is an equidigital number, since it uses as much as digits as its factorization.

28242499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 28242499 is about 5314.3672247973. The cubic root of 28242499 is about 304.5330092567.

The spelling of 28242499 in words is "twenty-eight million, two hundred forty-two thousand, four hundred ninety-nine".