28308476 has 48 divisors (see below), whose sum is σ = 59136000. Its totient is φ = 11847024.

The previous prime is 28308473. The next prime is 28308479. The reversal of 28308476 is 67480382.

It is an interprime number because it is at equal distance from previous prime (28308473) and next prime (28308479).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28308473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64265 + ... + 64703.

It is an arithmetic number, because the mean of its divisors is an integer number (1232000).

Almost surely, 2^28308476 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28308476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29568000).

28308476 is an abundant number, since it is smaller than the sum of its proper divisors (30827524).

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

28308476 is a wasteful number, since it uses less digits than its factorization.

28308476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28308476 is about 5320.5710219863. The cubic root of 28308476 is about 304.7699636060.

The spelling of 28308476 in words is "twenty-eight million, three hundred eight thousand, four hundred seventy-six".