228928380 has 24 divisors (see below), whose sum is σ = 640999632. Its totient is φ = 61047552.

The previous prime is 228928373. The next prime is 228928387. The reversal of 228928380 is 83829822.

It is an interprime number because it is at equal distance from previous prime (228928373) and next prime (228928387).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228928387) 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, 1907677 + ... + 1907796.

It is an arithmetic number, because the mean of its divisors is an integer number (26708318).

Almost surely, 2^228928380 is an apocalyptic number.

228928380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228928380 is an abundant number, since it is smaller than the sum of its proper divisors (412071252).

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

228928380 is a wasteful number, since it uses less digits than its factorization.

228928380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3815485 (or 3815483 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 228928380 is about 15130.3793739615. The cubic root of 228928380 is about 611.7395298949.

The spelling of 228928380 in words is "two hundred twenty-eight million, nine hundred twenty-eight thousand, three hundred eighty".