1938842633 has 24 divisors (see below), whose sum is σ = 2434219200. Its totient is φ = 1530658080.

The previous prime is 1938842621. The next prime is 1938842651. The reversal of 1938842633 is 3362488391.

It is a happy number.

It is not a de Polignac number, because 1938842633 - 2¹⁰ = 1938841609 is a prime.

It is a super-2 number, since 2×1938842633² = 7518221511076745378, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1938842533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 309668 + ... + 315866.

It is an arithmetic number, because the mean of its divisors is an integer number (101425800).

Almost surely, 2^1938842633 is an apocalyptic number.

1938842633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1938842633 is a deficient number, since it is larger than the sum of its proper divisors (495376567).

1938842633 is a wasteful number, since it uses less digits than its factorization.

1938842633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6717 (or 6710 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The square root of 1938842633 is about 44032.2907989126. The cubic root of 1938842633 is about 1246.9456378162.

The spelling of 1938842633 in words is "one billion, nine hundred thirty-eight million, eight hundred forty-two thousand, six hundred thirty-three".