28242351 has 10 divisors (see below), whose sum is σ = 42189312. Its totient is φ = 18828180.

The previous prime is 28242349. The next prime is 28242353. The reversal of 28242351 is 15324282.

It is an interprime number because it is at equal distance from previous prime (28242349) and next prime (28242353).

It is not a de Polignac number, because 28242351 - 2¹ = 28242349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28242353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 174255 + ... + 174416.

Almost surely, 2^28242351 is an apocalyptic number.

28242351 is a deficient number, since it is larger than the sum of its proper divisors (13946961).

28242351 is an equidigital number, since it uses as much as digits as its factorization.

28242351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348683 (or 348674 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28242351 is about 5314.3533002615. The cubic root of 28242351 is about 304.5324773047.

The spelling of 28242351 in words is "twenty-eight million, two hundred forty-two thousand, three hundred fifty-one".