28490872 has 8 divisors (see below), whose sum is σ = 53420400. Its totient is φ = 14245432.

The previous prime is 28490867. The next prime is 28490873. The reversal of 28490872 is 27809482.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28490873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780672 + ... + 1780687.

It is an arithmetic number, because the mean of its divisors is an integer number (6677550).

Almost surely, 2^28490872 is an apocalyptic number.

It is an amenable number.

28490872 is a deficient number, since it is larger than the sum of its proper divisors (24929528).

28490872 is a wasteful number, since it uses less digits than its factorization.

28490872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561365 (or 3561361 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 28490872 is about 5337.6841420226. The cubic root of 28490872 is about 305.4231232064.

The spelling of 28490872 in words is "twenty-eight million, four hundred ninety thousand, eight hundred seventy-two".