28371384 has 40 divisors (see below), whose sum is σ = 79467960. Its totient is φ = 9456912.

The previous prime is 28371383. The next prime is 28371391. The reversal of 28371384 is 48317382.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28371383) 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 9 ways as a sum of consecutive naturals, for example, 21244 + ... + 22539.

It is an arithmetic number, because the mean of its divisors is an integer number (1986699).

Almost surely, 2^28371384 is an apocalyptic number.

28371384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28371384 is an abundant number, since it is smaller than the sum of its proper divisors (51096576).

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

28371384 is a wasteful number, since it uses less digits than its factorization.

28371384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43801 (or 43788 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28371384 is about 5326.4795127739. The cubic root of 28371384 is about 304.9955531019.

The spelling of 28371384 in words is "twenty-eight million, three hundred seventy-one thousand, three hundred eighty-four".