228089840 has 60 divisors (see below), whose sum is σ = 582926232. Its totient is φ = 82938240.

The previous prime is 228089821. The next prime is 228089881. The reversal of 228089840 is 48980822.

It is a super-2 number, since 2×228089840² = 104049950222451200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2102 + ... + 21461.

Almost surely, 2^228089840 is an apocalyptic number.

228089840 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 228089840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291463116).

228089840 is an abundant number, since it is smaller than the sum of its proper divisors (354836392).

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

228089840 is a wasteful number, since it uses less digits than its factorization.

228089840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23598 (or 23581 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 228089840 is about 15102.6434772195. The cubic root of 228089840 is about 610.9917040776.

The spelling of 228089840 in words is "two hundred twenty-eight million, eighty-nine thousand, eight hundred forty".