28740120 has 64 divisors (see below), whose sum is σ = 88564320. Its totient is φ = 7455744.

The previous prime is 28740113. The next prime is 28740169. The reversal of 28740120 is 2104782.

It is a super-2 number, since 2×28740120² = 1651988995228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1204 + ... + 7676.

Almost surely, 2^28740120 is an apocalyptic number.

28740120 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 28740120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44282160).

28740120 is an abundant number, since it is smaller than the sum of its proper divisors (59824200).

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

28740120 is a wasteful number, since it uses less digits than its factorization.

28740120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6524 (or 6520 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 28740120 is about 5360.9812534647. The cubic root of 28740120 is about 306.3111875520.

The spelling of 28740120 in words is "twenty-eight million, seven hundred forty thousand, one hundred twenty".