228977780 has 24 divisors (see below), whose sum is σ = 496366080. Its totient is φ = 88636320.

The previous prime is 228977779. The next prime is 228977789. The reversal of 228977780 is 87779822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228977789) 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, 184040 + ... + 185279.

It is an arithmetic number, because the mean of its divisors is an integer number (20681920).

Almost surely, 2^228977780 is an apocalyptic number.

228977780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228977780 is an abundant number, since it is smaller than the sum of its proper divisors (267388300).

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

228977780 is a wasteful number, since it uses less digits than its factorization.

228977780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369359 (or 369357 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 50.

The square root of 228977780 is about 15132.0117631464. The cubic root of 228977780 is about 611.7835287492.

The spelling of 228977780 in words is "two hundred twenty-eight million, nine hundred seventy-seven thousand, seven hundred eighty".