28269486 has 80 divisors (see below), whose sum is σ = 73424736. Its totient is φ = 7962624.

The previous prime is 28269401. The next prime is 28269491. The reversal of 28269486 is 68496282.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 109870 + ... + 110126.

Almost surely, 2^28269486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28269486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36712368).

28269486 is an abundant number, since it is smaller than the sum of its proper divisors (45155250).

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

28269486 is a wasteful number, since it uses less digits than its factorization.

28269486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 366 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28269486 is about 5316.9056790581. The cubic root of 28269486 is about 304.6299767856.

The spelling of 28269486 in words is "twenty-eight million, two hundred sixty-nine thousand, four hundred eighty-six".