28426284 has 36 divisors (see below), whose sum is σ = 73611720. Its totient is φ = 9243840.

The previous prime is 28426253. The next prime is 28426289. The reversal of 28426284 is 48262482.

It is a happy number.

28426284 is a `hidden beast` number, since 28 + 4 + 2 + 628 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28426289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8154 + ... + 11105.

It is an arithmetic number, because the mean of its divisors is an integer number (2044770).

Almost surely, 2^28426284 is an apocalyptic number.

It is an amenable number.

28426284 is an abundant number, since it is smaller than the sum of its proper divisors (45185436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28426284 is a wasteful number, since it uses less digits than its factorization.

28426284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19310 (or 19305 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 28426284 is about 5331.6305198316. The cubic root of 28426284 is about 305.1921533940.

The spelling of 28426284 in words is "twenty-eight million, four hundred twenty-six thousand, two hundred eighty-four".