28372320 has 288 divisors, whose sum is σ = 109680480. Its totient is φ = 6635520.

The previous prime is 28372313. The next prime is 28372321. The reversal of 28372320 is 2327382.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28372321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 465090 + ... + 465150.

It is an arithmetic number, because the mean of its divisors is an integer number (380835).

Almost surely, 2^28372320 is an apocalyptic number.

28372320 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 28372320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54840240).

28372320 is an abundant number, since it is smaller than the sum of its proper divisors (81308160).

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

28372320 is a wasteful number, since it uses less digits than its factorization.

28372320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 28372320 is about 5326.5673749611. The cubic root of 28372320 is about 304.9989070999.

The spelling of 28372320 in words is "twenty-eight million, three hundred seventy-two thousand, three hundred twenty".