228571488 has 72 divisors (see below), whose sum is σ = 665152488. Its totient is φ = 74414592.

The previous prime is 228571471. The next prime is 228571529. The reversal of 228571488 is 884175822.

It is a happy number.

228571488 is a `hidden beast` number, since 22 + 85 + 71 + 488 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3156 + ... + 21612.

It is an arithmetic number, because the mean of its divisors is an integer number (9238229).

Almost surely, 2^228571488 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 228571488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332576244).

228571488 is an abundant number, since it is smaller than the sum of its proper divisors (436581000).

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

228571488 is a wasteful number, since it uses less digits than its factorization.

228571488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18516 (or 18505 counting only the distinct ones).

The product of its digits is 286720, while the sum is 45.

The square root of 228571488 is about 15118.5808857842. The cubic root of 228571488 is about 611.4214704556.

The spelling of 228571488 in words is "two hundred twenty-eight million, five hundred seventy-one thousand, four hundred eighty-eight".