228204640 has 96 divisors (see below), whose sum is σ = 562222080. Its totient is φ = 87436800.

The previous prime is 228204623. The next prime is 228204659. The reversal of 228204640 is 46402822.

It is a junction number, because it is equal to n+sod(n) for n = 228204599 and 228204608.

It is a congruent number.

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, 689275 + ... + 689605.

It is an arithmetic number, because the mean of its divisors is an integer number (5856480).

Almost surely, 2^228204640 is an apocalyptic number.

228204640 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 228204640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281111040).

228204640 is an abundant number, since it is smaller than the sum of its proper divisors (334017440).

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

228204640 is a wasteful number, since it uses less digits than its factorization.

228204640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 228204640 is about 15106.4436582539. The cubic root of 228204640 is about 611.0941930548.

The spelling of 228204640 in words is "two hundred twenty-eight million, two hundred four thousand, six hundred forty".