28400302 has 24 divisors (see below), whose sum is σ = 52473744. Its totient is φ = 11454912.

The previous prime is 28400279. The next prime is 28400311. The reversal of 28400302 is 20300482.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28400302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6858 + ... + 10189.

It is an arithmetic number, because the mean of its divisors is an integer number (2186406).

Almost surely, 2^28400302 is an apocalyptic number.

28400302 is a deficient number, since it is larger than the sum of its proper divisors (24073442).

28400302 is a wasteful number, since it uses less digits than its factorization.

28400302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17080 (or 17073 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 28400302 is about 5329.1933723595. The cubic root of 28400302 is about 305.0991418271.

Adding to 28400302 its reverse (20300482), we get a palindrome (48700784).

The spelling of 28400302 in words is "twenty-eight million, four hundred thousand, three hundred two".