28269144 has 48 divisors (see below), whose sum is σ = 76986000. Its totient is φ = 9370944.

The previous prime is 28269133. The next prime is 28269149. The reversal of 28269144 is 44196282.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28269099 and 28269108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28269149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13342 + ... + 15314.

It is an arithmetic number, because the mean of its divisors is an integer number (1603875).

Almost surely, 2^28269144 is an apocalyptic number.

28269144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28269144 is an abundant number, since it is smaller than the sum of its proper divisors (48716856).

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

28269144 is a wasteful number, since it uses less digits than its factorization.

28269144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2177 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28269144 is about 5316.8735173972. The cubic root of 28269144 is about 304.6287483247.

The spelling of 28269144 in words is "twenty-eight million, two hundred sixty-nine thousand, one hundred forty-four".