1642244238 has 12 divisors (see below), whose sum is σ = 3558195888. Its totient is φ = 547414740.

The previous prime is 1642244171. The next prime is 1642244243. The reversal of 1642244238 is 8324422461.

1642244238 is a `hidden beast` number, since 1 + 6 + 4 + 224 + 423 + 8 = 666.

It is a super-2 number, since 2×1642244238² = 5393932274488401288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45617878 + ... + 45617913.

It is an arithmetic number, because the mean of its divisors is an integer number (296516324).

Almost surely, 2^1642244238 is an apocalyptic number.

1642244238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1642244238 is an abundant number, since it is smaller than the sum of its proper divisors (1915951650).

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

1642244238 is a wasteful number, since it uses less digits than its factorization.

1642244238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91235799 (or 91235796 counting only the distinct ones).

The product of its digits is 73728, while the sum is 36.

The square root of 1642244238 is about 40524.6127433687. The cubic root of 1642244238 is about 1179.8113837181.

Adding to 1642244238 its reverse (8324422461), we get a palindrome (9966666699).

The spelling of 1642244238 in words is "one billion, six hundred forty-two million, two hundred forty-four thousand, two hundred thirty-eight".