228940956 has 72 divisors (see below), whose sum is σ = 611367120. Its totient is φ = 72036864.

The previous prime is 228940951. The next prime is 228940961. The reversal of 228940956 is 659049822.

It is an interprime number because it is at equal distance from previous prime (228940951) and next prime (228940961).

It is a super-2 number, since 2×228940956² = 104827922668387872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228940951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295786 + ... + 296558.

It is an arithmetic number, because the mean of its divisors is an integer number (8491210).

Almost surely, 2^228940956 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 228940956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305683560).

228940956 is an abundant number, since it is smaller than the sum of its proper divisors (382426164).

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

228940956 is a wasteful number, since it uses less digits than its factorization.

228940956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1230 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 228940956 is about 15130.7949559830. The cubic root of 228940956 is about 611.7507314993.

The spelling of 228940956 in words is "two hundred twenty-eight million, nine hundred forty thousand, nine hundred fifty-six".