228447765 has 48 divisors (see below), whose sum is σ = 487363968. Its totient is φ = 96398208.

The previous prime is 228447757. The next prime is 228447787. The reversal of 228447765 is 567744822.

It is a happy number.

It is not a de Polignac number, because 228447765 - 2³ = 228447757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 228447765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23799 + ... + 31988.

It is an arithmetic number, because the mean of its divisors is an integer number (10153416).

Almost surely, 2^228447765 is an apocalyptic number.

It is an amenable number.

228447765 is an abundant number, since it is smaller than the sum of its proper divisors (258916203).

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

228447765 is a wasteful number, since it uses less digits than its factorization.

228447765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55818 (or 55815 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 228447765 is about 15114.4885788438. The cubic root of 228447765 is about 611.3111321799.

The spelling of 228447765 in words is "two hundred twenty-eight million, four hundred forty-seven thousand, seven hundred sixty-five".