28347132 has 48 divisors (see below), whose sum is σ = 75301632. Its totient is φ = 8215680.

The previous prime is 28347131. The next prime is 28347133. The reversal of 28347132 is 23174382.

It is an interprime number because it is at equal distance from previous prime (28347131) and next prime (28347133).

It is a self number, because there is not a number n which added to its sum of digits gives 28347132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28347131) 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, 1633 + ... + 7704.

It is an arithmetic number, because the mean of its divisors is an integer number (1568784).

Almost surely, 2^28347132 is an apocalyptic number.

28347132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28347132 is an abundant number, since it is smaller than the sum of its proper divisors (46954500).

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

28347132 is a wasteful number, since it uses less digits than its factorization.

28347132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9378 (or 9376 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 28347132 is about 5324.2024754887. The cubic root of 28347132 is about 304.9086244234.

The spelling of 28347132 in words is "twenty-eight million, three hundred forty-seven thousand, one hundred thirty-two".