28485384 has 32 divisors (see below), whose sum is σ = 72731520. Its totient is φ = 9292736.

The previous prime is 28485383. The next prime is 28485397. The reversal of 28485384 is 48358482.

It is a happy number.

It is a super-2 number, since 2×28485384² = 1622834203254912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28485383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11499 + ... + 13754.

It is an arithmetic number, because the mean of its divisors is an integer number (2272860).

Almost surely, 2^28485384 is an apocalyptic number.

28485384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28485384 is an abundant number, since it is smaller than the sum of its proper divisors (44246136).

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

28485384 is a wasteful number, since it uses less digits than its factorization.

28485384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25309 (or 25305 counting only the distinct ones).

The product of its digits is 245760, while the sum is 42.

The square root of 28485384 is about 5337.1700366393. The cubic root of 28485384 is about 305.4035114312.

The spelling of 28485384 in words is "twenty-eight million, four hundred eighty-five thousand, three hundred eighty-four".