28427076 has 72 divisors (see below), whose sum is σ = 75555480. Its totient is φ = 8999424.

The previous prime is 28427053. The next prime is 28427081. The reversal of 28427076 is 67072482.

It can be written as a sum of positive squares in 4 ways, for example, as 5616900 + 22810176 = 2370^2 + 4776^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28427076.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76026 + ... + 76398.

Almost surely, 2^28427076 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 28427076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37777740).

28427076 is an abundant number, since it is smaller than the sum of its proper divisors (47128404).

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

28427076 is a wasteful number, since it uses less digits than its factorization.

28427076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 28427076 is about 5331.7047930282. The cubic root of 28427076 is about 305.1949877420.

The spelling of 28427076 in words is "twenty-eight million, four hundred twenty-seven thousand, seventy-six".