228117396 has 48 divisors (see below), whose sum is σ = 578824064. Its totient is φ = 69503616.

The previous prime is 228117371. The next prime is 228117397. The reversal of 228117396 is 693711822.

228117396 = T₁₈₅ + T₁₈₆ + ... + T₁₁₁₁.

228117396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228117397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8970 + ... + 23166.

Almost surely, 2^228117396 is an apocalyptic number.

228117396 is a gapful number since it is divisible by the number (26) 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 228117396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289412032).

228117396 is an abundant number, since it is smaller than the sum of its proper divisors (350706668).

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

228117396 is a wasteful number, since it uses less digits than its factorization.

228117396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14320 (or 14318 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 228117396 is about 15103.5557402884. Note that the first 3 decimals coincide. The cubic root of 228117396 is about 611.0163081392.

The spelling of 228117396 in words is "two hundred twenty-eight million, one hundred seventeen thousand, three hundred ninety-six".