28901884 has 48 divisors (see below), whose sum is σ = 58183776. Its totient is φ = 12441600.

The previous prime is 28901881. The next prime is 28901911. The reversal of 28901884 is 48810982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28901881) 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 15 ways as a sum of consecutive naturals, for example, 66532 + ... + 66964.

It is an arithmetic number, because the mean of its divisors is an integer number (1212162).

Almost surely, 2^28901884 is an apocalyptic number.

It is an amenable number.

28901884 is an abundant number, since it is smaller than the sum of its proper divisors (29281892).

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

28901884 is a wasteful number, since it uses less digits than its factorization.

28901884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 28901884 is about 5376.0472468162. The cubic root of 28901884 is about 306.8848043651.

It can be divided in two parts, 2890 and 1884, that added together give a palindrome (4774).

The spelling of 28901884 in words is "twenty-eight million, nine hundred one thousand, eight hundred eighty-four".