28405674 has 128 divisors (see below), whose sum is σ = 76204800. Its totient is φ = 7741440.

The previous prime is 28405673. The next prime is 28405679. The reversal of 28405674 is 47650482.

It is not an unprimeable number, because it can be changed into a prime (28405673) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 292794 + ... + 292890.

It is an arithmetic number, because the mean of its divisors is an integer number (595350).

Almost surely, 2^28405674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28405674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38102400).

28405674 is an abundant number, since it is smaller than the sum of its proper divisors (47799126).

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

28405674 is a wasteful number, since it uses less digits than its factorization.

28405674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 28405674 is about 5329.6973647666. The cubic root of 28405674 is about 305.1183774120.

The spelling of 28405674 in words is "twenty-eight million, four hundred five thousand, six hundred seventy-four".