28742099 has 2 divisors, whose sum is σ = 28742100. Its totient is φ = 28742098.

The previous prime is 28742093. The next prime is 28742113. The reversal of 28742099 is 99024782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28742099 - 2⁴ = 28742083 is a prime.

It is a super-2 number, since 2×28742099² = 1652216509851602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28742093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14371049 + 14371050.

It is an arithmetic number, because the mean of its divisors is an integer number (14371050).

Almost surely, 2^28742099 is an apocalyptic number.

28742099 is a deficient number, since it is larger than the sum of its proper divisors (1).

28742099 is an equidigital number, since it uses as much as digits as its factorization.

28742099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 28742099 is about 5361.1658247064. The cubic root of 28742099 is about 306.3182180948.

The spelling of 28742099 in words is "twenty-eight million, seven hundred forty-two thousand, ninety-nine".