228699772 has 48 divisors (see below), whose sum is σ = 475195392. Its totient is φ = 94242240.

The previous prime is 228699769. The next prime is 228699773. The reversal of 228699772 is 277996822.

228699772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228699773) 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, 149403 + ... + 150925.

It is an arithmetic number, because the mean of its divisors is an integer number (9899904).

Almost surely, 2^228699772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228699772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237597696).

228699772 is an abundant number, since it is smaller than the sum of its proper divisors (246495620).

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

228699772 is a wasteful number, since it uses less digits than its factorization.

228699772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738 (or 1736 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The square root of 228699772 is about 15122.8228846337. The cubic root of 228699772 is about 611.5358342715.

The spelling of 228699772 in words is "two hundred twenty-eight million, six hundred ninety-nine thousand, seven hundred seventy-two".