28249430 has 16 divisors (see below), whose sum is σ = 55471824. Its totient is φ = 10272480.

The previous prime is 28249423. The next prime is 28249483. The reversal of 28249430 is 3494282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128297 + ... + 128516.

It is an arithmetic number, because the mean of its divisors is an integer number (3466989).

Almost surely, 2^28249430 is an apocalyptic number.

28249430 is a deficient number, since it is larger than the sum of its proper divisors (27222394).

28249430 is a wasteful number, since it uses less digits than its factorization.

28249430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256831.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 28249430 is about 5315.0192850073. The cubic root of 28249430 is about 304.5579190643.

The spelling of 28249430 in words is "twenty-eight million, two hundred forty-nine thousand, four hundred thirty".