228431418 has 32 divisors (see below), whose sum is σ = 469385280. Its totient is φ = 74067840.

The previous prime is 228431407. The next prime is 228431429. The reversal of 228431418 is 814134822.

It is an interprime number because it is at equal distance from previous prime (228431407) and next prime (228431429).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96493 + ... + 98831.

It is an arithmetic number, because the mean of its divisors is an integer number (14668290).

Almost surely, 2^228431418 is an apocalyptic number.

228431418 is an abundant number, since it is smaller than the sum of its proper divisors (240953862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228431418 is a wasteful number, since it uses less digits than its factorization.

228431418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782.

The product of its digits is 12288, while the sum is 33.

The square root of 228431418 is about 15113.9477966546. The cubic root of 228431418 is about 611.2965506679.

The spelling of 228431418 in words is "two hundred twenty-eight million, four hundred thirty-one thousand, four hundred eighteen".