228629291 has 18 divisors (see below), whose sum is σ = 257487588. Its totient is φ = 201325440.

The previous prime is 228629263. The next prime is 228629329. The reversal of 228629291 is 192926822.

228629291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-228629291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228629221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2356955 + ... + 2357051.

It is an arithmetic number, because the mean of its divisors is an integer number (14304866).

Almost surely, 2^228629291 is an apocalyptic number.

228629291 is a deficient number, since it is larger than the sum of its proper divisors (28858297).

228629291 is an frugal number, since it uses more digits than its factorization.

228629291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 155 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 228629291 is about 15120.4924192303. The cubic root of 228629291 is about 611.4730065079.

The spelling of 228629291 in words is "two hundred twenty-eight million, six hundred twenty-nine thousand, two hundred ninety-one".