228158840 has 128 divisors (see below), whose sum is σ = 665280000. Its totient is φ = 68387328.

The previous prime is 228158831. The next prime is 228158851. The reversal of 228158840 is 48851822.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 228158794 and 228158803.

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, 67511 + ... + 70809.

It is an arithmetic number, because the mean of its divisors is an integer number (5197500).

Almost surely, 2^228158840 is an apocalyptic number.

228158840 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 228158840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332640000).

228158840 is an abundant number, since it is smaller than the sum of its proper divisors (437121160).

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

228158840 is a wasteful number, since it uses less digits than its factorization.

228158840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349 (or 3345 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 228158840 is about 15104.9276727828. The cubic root of 228158840 is about 611.0533087172.

The spelling of 228158840 in words is "two hundred twenty-eight million, one hundred fifty-eight thousand, eight hundred forty".