1642123338 has 16 divisors (see below), whose sum is σ = 3306290400. Its totient is φ = 543700496.

The previous prime is 1642123337. The next prime is 1642123363. The reversal of 1642123338 is 8333212461.

It is a junction number, because it is equal to n+sod(n) for n = 1642123299 and 1642123308.

It is not an unprimeable number, because it can be changed into a prime (1642123337) 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, 917520 + ... + 919307.

It is an arithmetic number, because the mean of its divisors is an integer number (206643150).

Almost surely, 2^1642123338 is an apocalyptic number.

1642123338 is an abundant number, since it is smaller than the sum of its proper divisors (1664167062).

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

1642123338 is a wasteful number, since it uses less digits than its factorization.

1642123338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836981.

The product of its digits is 20736, while the sum is 33.

The square root of 1642123338 is about 40523.1210298516. The cubic root of 1642123338 is about 1179.7824309202.

Adding to 1642123338 its reverse (8333212461), we get a palindrome (9975335799).

It can be divided in two parts, 1642123 and 338, that added together give a palindrome (1642461).

The spelling of 1642123338 in words is "one billion, six hundred forty-two million, one hundred twenty-three thousand, three hundred thirty-eight".