28359420 has 96 divisors (see below), whose sum is σ = 83435520. Its totient is φ = 7188480.

The previous prime is 28359347. The next prime is 28359431. The reversal of 28359420 is 2495382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146844 + ... + 147036.

It is an arithmetic number, because the mean of its divisors is an integer number (869120).

Almost surely, 2^28359420 is an apocalyptic number.

28359420 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 28359420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41717760).

28359420 is an abundant number, since it is smaller than the sum of its proper divisors (55076100).

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

28359420 is a wasteful number, since it uses less digits than its factorization.

28359420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 28359420 is about 5325.3563261063. The cubic root of 28359420 is about 304.9526756280.

The spelling of 28359420 in words is "twenty-eight million, three hundred fifty-nine thousand, four hundred twenty".