228121742 has 8 divisors (see below), whose sum is σ = 362311056. Its totient is φ = 107351392.

The previous prime is 228121741. The next prime is 228121757. The reversal of 228121742 is 247121822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×228121742² = 104079058346229128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228121741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3354698 + ... + 3354765.

It is an arithmetic number, because the mean of its divisors is an integer number (45288882).

Almost surely, 2^228121742 is an apocalyptic number.

228121742 is a deficient number, since it is larger than the sum of its proper divisors (134189314).

228121742 is a wasteful number, since it uses less digits than its factorization.

228121742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6709482.

The product of its digits is 3584, while the sum is 29.

The square root of 228121742 is about 15103.6996130087. The cubic root of 228121742 is about 611.0201883928.

The spelling of 228121742 in words is "two hundred twenty-eight million, one hundred twenty-one thousand, seven hundred forty-two".