28013180 has 48 divisors (see below), whose sum is σ = 63837984. Its totient is φ = 10264320.

The previous prime is 28013179. The next prime is 28013221. The reversal of 28013180 is 8131082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42050 + ... + 42710.

It is an arithmetic number, because the mean of its divisors is an integer number (1329958).

Almost surely, 2^28013180 is an apocalyptic number.

28013180 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 28013180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31918992).

28013180 is an abundant number, since it is smaller than the sum of its proper divisors (35824804).

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

28013180 is a wasteful number, since it uses less digits than its factorization.

28013180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 28013180 is about 5292.7478685462. The cubic root of 28013180 is about 303.7065352407.

The spelling of 28013180 in words is "twenty-eight million, thirteen thousand, one hundred eighty".