28396430 has 16 divisors (see below), whose sum is σ = 51181200. Its totient is φ = 11343552.

The previous prime is 28396399. The next prime is 28396439. The reversal of 28396430 is 3469382.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28396439) by changing a digit.

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, 9137 + ... + 11843.

It is an arithmetic number, because the mean of its divisors is an integer number (3198825).

Almost surely, 2^28396430 is an apocalyptic number.

28396430 is a deficient number, since it is larger than the sum of its proper divisors (22784770).

28396430 is a wasteful number, since it uses less digits than its factorization.

28396430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3763.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 28396430 is about 5328.8300779815. The cubic root of 28396430 is about 305.0852758059.

The spelling of 28396430 in words is "twenty-eight million, three hundred ninety-six thousand, four hundred thirty".