28681430 has 16 divisors (see below), whose sum is σ = 52827984. Its totient is φ = 11205600.

The previous prime is 28681409. The next prime is 28681439. The reversal of 28681430 is 3418682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28681439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32921 + ... + 33780.

It is an arithmetic number, because the mean of its divisors is an integer number (3301749).

Almost surely, 2^28681430 is an apocalyptic number.

28681430 is a deficient number, since it is larger than the sum of its proper divisors (24146554).

28681430 is a wasteful number, since it uses less digits than its factorization.

28681430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66751.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28681430 is about 5355.5046447557. The cubic root of 28681430 is about 306.1025401435.

The spelling of 28681430 in words is "twenty-eight million, six hundred eighty-one thousand, four hundred thirty".