228143787 has 8 divisors (see below), whose sum is σ = 314004480. Its totient is φ = 147189480.

The previous prime is 228143759. The next prime is 228143809. The reversal of 228143787 is 787341822.

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

It is a de Polignac number, because none of the positive numbers 2^k-228143787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228143717) 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, 1226487 + ... + 1226672.

It is an arithmetic number, because the mean of its divisors is an integer number (39250560).

Almost surely, 2^228143787 is an apocalyptic number.

228143787 is a deficient number, since it is larger than the sum of its proper divisors (85860693).

228143787 is a wasteful number, since it uses less digits than its factorization.

228143787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453193.

The product of its digits is 150528, while the sum is 42.

The square root of 228143787 is about 15104.4293834623. The cubic root of 228143787 is about 611.0398701441.

The spelling of 228143787 in words is "two hundred twenty-eight million, one hundred forty-three thousand, seven hundred eighty-seven".