228087840 has 96 divisors (see below), whose sum is σ = 721224000. Its totient is φ = 60591104.

The previous prime is 228087817. The next prime is 228087857. The reversal of 228087840 is 48780822.

It is a tau number, because it is divible by the number of its divisors (96).

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, 151411 + ... + 152909.

It is an arithmetic number, because the mean of its divisors is an integer number (7512750).

Almost surely, 2^228087840 is an apocalyptic number.

228087840 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 228087840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360612000).

228087840 is an abundant number, since it is smaller than the sum of its proper divisors (493136160).

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

228087840 is a wasteful number, since it uses less digits than its factorization.

228087840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834 (or 1826 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 39.

The square root of 228087840 is about 15102.5772635004. The cubic root of 228087840 is about 610.9899182506.

The spelling of 228087840 in words is "two hundred twenty-eight million, eighty-seven thousand, eight hundred forty".