28878460 has 48 divisors (see below), whose sum is σ = 65973600. Its totient is φ = 10554624.

The previous prime is 28878433. The next prime is 28878467. The reversal of 28878460 is 6487882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28878467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27831 + ... + 28849.

It is an arithmetic number, because the mean of its divisors is an integer number (1374450).

Almost surely, 2^28878460 is an apocalyptic number.

28878460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28878460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32986800).

28878460 is an abundant number, since it is smaller than the sum of its proper divisors (37095140).

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

28878460 is a wasteful number, since it uses less digits than its factorization.

28878460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 43.

The square root of 28878460 is about 5373.8682529441. The cubic root of 28878460 is about 306.8018753706.

The spelling of 28878460 in words is "twenty-eight million, eight hundred seventy-eight thousand, four hundred sixty".