28269400 has 48 divisors (see below), whose sum is σ = 66390840. Its totient is φ = 11193600.

The previous prime is 28269379. The next prime is 28269401. The reversal of 28269400 is 496282.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28269401) 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, 20740 + ... + 22060.

Almost surely, 2^28269400 is an apocalyptic number.

28269400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28269400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33195420).

28269400 is an abundant number, since it is smaller than the sum of its proper divisors (38121440).

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

28269400 is a wasteful number, since it uses less digits than its factorization.

28269400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28269400 is about 5316.8975916412. The cubic root of 28269400 is about 304.6296678753.

The spelling of 28269400 in words is "twenty-eight million, two hundred sixty-nine thousand, four hundred".