1838939854 has 4 divisors (see below), whose sum is σ = 2758409784. Its totient is φ = 919469926.

The previous prime is 1838939819. The next prime is 1838939863. The reversal of 1838939854 is 4589398381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4589398381 = 3307 ⋅1387783.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459734962 + ... + 459734965.

It is an arithmetic number, because the mean of its divisors is an integer number (689602446).

Almost surely, 2^1838939854 is an apocalyptic number.

1838939854 is a deficient number, since it is larger than the sum of its proper divisors (919469930).

1838939854 is an equidigital number, since it uses as much as digits as its factorization.

1838939854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919469929.

The product of its digits is 7464960, while the sum is 58.

The square root of 1838939854 is about 42882.8620080330. The cubic root of 1838939854 is about 1225.1497479576.

The spelling of 1838939854 in words is "one billion, eight hundred thirty-eight million, nine hundred thirty-nine thousand, eight hundred fifty-four".