28707120 has 120 divisors (see below), whose sum is σ = 103857936. Its totient is φ = 7064064.

The previous prime is 28707097. The next prime is 28707131. The reversal of 28707120 is 2170782.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7827 + ... + 10893.

Almost surely, 2^28707120 is an apocalyptic number.

28707120 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 28707120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51928968).

28707120 is an abundant number, since it is smaller than the sum of its proper divisors (75150816).

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

28707120 is a wasteful number, since it uses less digits than its factorization.

28707120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099 (or 3090 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 28707120 is about 5357.9025747022. The cubic root of 28707120 is about 306.1939050389.

The spelling of 28707120 in words is "twenty-eight million, seven hundred seven thousand, one hundred twenty".