228784815 has 24 divisors (see below), whose sum is σ = 453212448. Its totient is φ = 104587200.

The previous prime is 228784789. The next prime is 228784837. The reversal of 228784815 is 518487822.

It is a happy number.

It is not a de Polignac number, because 228784815 - 2⁸ = 228784559 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362836 + ... + 363465.

It is an arithmetic number, because the mean of its divisors is an integer number (18883852).

Almost surely, 2^228784815 is an apocalyptic number.

228784815 is a deficient number, since it is larger than the sum of its proper divisors (224427633).

228784815 is a wasteful number, since it uses less digits than its factorization.

228784815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726319 (or 726316 counting only the distinct ones).

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

The square root of 228784815 is about 15125.6343668621. The cubic root of 228784815 is about 611.6116256267.

The spelling of 228784815 in words is "two hundred twenty-eight million, seven hundred eighty-four thousand, eight hundred fifteen".