228285787 has 8 divisors (see below), whose sum is σ = 242707104. Its totient is φ = 214239168.

The previous prime is 228285763. The next prime is 228285791. The reversal of 228285787 is 787582822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228285787 - 2¹¹ = 228283739 is a prime.

It is a super-2 number, since 2×228285787² = 104228801092418738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228285787.

It is not an unprimeable number, because it can be changed into a prime (228285737) 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, 92418 + ... + 94855.

It is an arithmetic number, because the mean of its divisors is an integer number (30338388).

Almost surely, 2^228285787 is an apocalyptic number.

228285787 is a deficient number, since it is larger than the sum of its proper divisors (14421317).

228285787 is a wasteful number, since it uses less digits than its factorization.

228285787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187349.

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

The square root of 228285787 is about 15109.1292601526. The cubic root of 228285787 is about 611.1666172087.

The spelling of 228285787 in words is "two hundred twenty-eight million, two hundred eighty-five thousand, seven hundred eighty-seven".