228248691 has 32 divisors (see below), whose sum is σ = 360775680. Its totient is φ = 126813600.

The previous prime is 228248689. The next prime is 228248693. The reversal of 228248691 is 196842822.

It is an interprime number because it is at equal distance from previous prime (228248689) and next prime (228248693).

It is not a de Polignac number, because 228248691 - 2¹ = 228248689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (228248693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13566 + ... + 25308.

It is an arithmetic number, because the mean of its divisors is an integer number (11274240).

Almost surely, 2^228248691 is an apocalyptic number.

228248691 is a deficient number, since it is larger than the sum of its proper divisors (132526989).

228248691 is a wasteful number, since it uses less digits than its factorization.

228248691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11807.

The product of its digits is 110592, while the sum is 42.

The square root of 228248691 is about 15107.9016080990. The cubic root of 228248691 is about 611.1335109500.

The spelling of 228248691 in words is "two hundred twenty-eight million, two hundred forty-eight thousand, six hundred ninety-one".