229742428 has 24 divisors (see below), whose sum is σ = 408094400. Its totient is φ = 113151168.

The previous prime is 229742417. The next prime is 229742431. The reversal of 229742428 is 824247922.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261526 + ... + 262402.

Almost surely, 2^229742428 is an apocalyptic number.

It is an amenable number.

229742428 is a deficient number, since it is larger than the sum of its proper divisors (178351972).

229742428 is a wasteful number, since it uses less digits than its factorization.

229742428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789 (or 1787 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 229742428 is about 15157.2566119334. The cubic root of 229742428 is about 612.4637683969.

The spelling of 229742428 in words is "two hundred twenty-nine million, seven hundred forty-two thousand, four hundred twenty-eight".