28360878 has 64 divisors (see below), whose sum is σ = 70533120. Its totient is φ = 7402752.

The previous prime is 28360873. The next prime is 28360903. The reversal of 28360878 is 87806382.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28360873) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 69138 + ... + 69546.

It is an arithmetic number, because the mean of its divisors is an integer number (1102080).

Almost surely, 2^28360878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28360878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35266560).

28360878 is an abundant number, since it is smaller than the sum of its proper divisors (42172242).

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

28360878 is a wasteful number, since it uses less digits than its factorization.

28360878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561.

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 28360878 is about 5325.4932165951. The cubic root of 28360878 is about 304.9579015621.

The spelling of 28360878 in words is "twenty-eight million, three hundred sixty thousand, eight hundred seventy-eight".