228785872 has 40 divisors (see below), whose sum is σ = 524073600. Its totient is φ = 94668672.

The previous prime is 228785861. The next prime is 228785933. The reversal of 228785872 is 278587822.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31972 + ... + 38467.

It is an arithmetic number, because the mean of its divisors is an integer number (13101840).

Almost surely, 2^228785872 is an apocalyptic number.

It is an amenable number.

228785872 is an abundant number, since it is smaller than the sum of its proper divisors (295287728).

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

228785872 is a wasteful number, since it uses less digits than its factorization.

228785872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70483 (or 70477 counting only the distinct ones).

The product of its digits is 1003520, while the sum is 49.

The square root of 228785872 is about 15125.6693075050. The cubic root of 228785872 is about 611.6125675197.

The spelling of 228785872 in words is "two hundred twenty-eight million, seven hundred eighty-five thousand, eight hundred seventy-two".