28145084 has 18 divisors (see below), whose sum is σ = 54139512. Its totient is φ = 12793000.

The previous prime is 28145083. The next prime is 28145087. The reversal of 28145084 is 48054182.

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 28145084.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28145083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28592 + ... + 29559.

Almost surely, 2^28145084 is an apocalyptic number.

It is an amenable number.

28145084 is a deficient number, since it is larger than the sum of its proper divisors (25994428).

28145084 is a wasteful number, since it uses less digits than its factorization.

28145084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58177 (or 58164 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 28145084 is about 5305.1940586561. The cubic root of 28145084 is about 304.1824706703.

The spelling of 28145084 in words is "twenty-eight million, one hundred forty-five thousand, eighty-four".