1938351457 has 24 divisors (see below), whose sum is σ = 2308352256. Its totient is φ = 1622301408.

The previous prime is 1938351379. The next prime is 1938351479. The reversal of 1938351457 is 7541538391.

It is a happy number.

It is not a de Polignac number, because 1938351457 - 2¹¹ = 1938349409 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1938351497) 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, 577458 + ... + 580804.

It is an arithmetic number, because the mean of its divisors is an integer number (96181344).

Almost surely, 2^1938351457 is an apocalyptic number.

It is an amenable number.

1938351457 is a deficient number, since it is larger than the sum of its proper divisors (370000799).

1938351457 is a wasteful number, since it uses less digits than its factorization.

1938351457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637 (or 3630 counting only the distinct ones).

The product of its digits is 453600, while the sum is 46.

The square root of 1938351457 is about 44026.7129933635. The cubic root of 1938351457 is about 1246.8403307484.

The spelling of 1938351457 in words is "one billion, nine hundred thirty-eight million, three hundred fifty-one thousand, four hundred fifty-seven".