1838721134 has 4 divisors (see below), whose sum is σ = 2758081704. Its totient is φ = 919360566.

The previous prime is 1838721127. The next prime is 1838721167. The reversal of 1838721134 is 4311278381.

It is a semiprime because it is the product of two primes.

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, 459680282 + ... + 459680285.

It is an arithmetic number, because the mean of its divisors is an integer number (689520426).

Almost surely, 2^1838721134 is an apocalyptic number.

1838721134 is a deficient number, since it is larger than the sum of its proper divisors (919360570).

1838721134 is an equidigital number, since it uses as much as digits as its factorization.

1838721134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919360569.

The product of its digits is 32256, while the sum is 38.

The square root of 1838721134 is about 42880.3117292773. The cubic root of 1838721134 is about 1225.1011737068.

The spelling of 1838721134 in words is "one billion, eight hundred thirty-eight million, seven hundred twenty-one thousand, one hundred thirty-four".