228440442 has 32 divisors (see below), whose sum is σ = 470296512. Its totient is φ = 73920384.

The previous prime is 228440411. The next prime is 228440473. The reversal of 228440442 is 244044822.

It is an interprime number because it is at equal distance from previous prime (228440411) and next prime (228440473).

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, 129438 + ... + 131190.

It is an arithmetic number, because the mean of its divisors is an integer number (14696766).

Almost surely, 2^228440442 is an apocalyptic number.

228440442 is an abundant number, since it is smaller than the sum of its proper divisors (241856070).

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

228440442 is a wasteful number, since it uses less digits than its factorization.

228440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2382.

The product of its (nonzero) digits is 16384, while the sum is 30.

The square root of 228440442 is about 15114.2463259006. The cubic root of 228440442 is about 611.3046001553.

The spelling of 228440442 in words is "two hundred twenty-eight million, four hundred forty thousand, four hundred forty-two".