28860380 has 24 divisors (see below), whose sum is σ = 62563200. Its totient is φ = 11171520.

The previous prime is 28860367. The next prime is 28860383. The reversal of 28860380 is 8306882.

It is a self number, because there is not a number n which added to its sum of digits gives 28860380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22655 + ... + 23894.

It is an arithmetic number, because the mean of its divisors is an integer number (2606800).

Almost surely, 2^28860380 is an apocalyptic number.

28860380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28860380 is an abundant number, since it is smaller than the sum of its proper divisors (33702820).

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

28860380 is a wasteful number, since it uses less digits than its factorization.

28860380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46589 (or 46587 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28860380 is about 5372.1857748965. The cubic root of 28860380 is about 306.7378352993.

The spelling of 28860380 in words is "twenty-eight million, eight hundred sixty thousand, three hundred eighty".