28251430 has 16 divisors (see below), whose sum is σ = 52035984. Its totient is φ = 11037600.

The previous prime is 28251413. The next prime is 28251493. The reversal of 28251430 is 3415282.

It is a junction number, because it is equal to n+sod(n) for n = 28251395 and 28251404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32421 + ... + 33280.

It is an arithmetic number, because the mean of its divisors is an integer number (3252249).

Almost surely, 2^28251430 is an apocalyptic number.

28251430 is a deficient number, since it is larger than the sum of its proper divisors (23784554).

28251430 is a wasteful number, since it uses less digits than its factorization.

28251430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65751.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 28251430 is about 5315.2074277492. The cubic root of 28251430 is about 304.5651062472.

The spelling of 28251430 in words is "twenty-eight million, two hundred fifty-one thousand, four hundred thirty".