228577780 has 24 divisors (see below), whose sum is σ = 480847752. Its totient is φ = 91272192.

The previous prime is 228577763. The next prime is 228577781. The reversal of 228577780 is 87775822.

It can be written as a sum of positive squares in 4 ways, for example, as 44595684 + 183982096 = 6678^2 + 13564^2 .

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 228577780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228577781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2224 + ... + 21496.

It is an arithmetic number, because the mean of its divisors is an integer number (20035323).

Almost surely, 2^228577780 is an apocalyptic number.

228577780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228577780 is an abundant number, since it is smaller than the sum of its proper divisors (252269972).

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

228577780 is a wasteful number, since it uses less digits than its factorization.

228577780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19875 (or 19873 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 228577780 is about 15118.7889726658. The cubic root of 228577780 is about 611.4270807042.

The spelling of 228577780 in words is "two hundred twenty-eight million, five hundred seventy-seven thousand, seven hundred eighty".