428236123 has 8 divisors (see below), whose sum is σ = 489546720. Its totient is φ = 366959040.

The previous prime is 428236099. The next prime is 428236141. The reversal of 428236123 is 321632824.

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

It is not a de Polignac number, because 428236123 - 2²¹ = 426138971 is a prime.

It is a super-2 number, since 2×428236123² = 366772354084142258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428236153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31983 + ... + 43351.

It is an arithmetic number, because the mean of its divisors is an integer number (61193340).

Almost surely, 2^428236123 is an apocalyptic number.

428236123 is a deficient number, since it is larger than the sum of its proper divisors (61310597).

428236123 is a wasteful number, since it uses less digits than its factorization.

428236123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16757.

The product of its digits is 13824, while the sum is 31.

The square root of 428236123 is about 20693.8667967106. The cubic root of 428236123 is about 753.7507654460.

Adding to 428236123 its reverse (321632824), we get a palindrome (749868947).

The spelling of 428236123 in words is "four hundred twenty-eight million, two hundred thirty-six thousand, one hundred twenty-three".