1831361538 has 16 divisors (see below), whose sum is σ = 3696327360. Its totient is φ = 604853136.

The previous prime is 1831361503. The next prime is 1831361563. The reversal of 1831361538 is 8351631381.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1831361496 and 1831361505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399470 + ... + 1400777.

It is an arithmetic number, because the mean of its divisors is an integer number (231020460).

Almost surely, 2^1831361538 is an apocalyptic number.

1831361538 is an abundant number, since it is smaller than the sum of its proper divisors (1864965822).

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

1831361538 is a wasteful number, since it uses less digits than its factorization.

1831361538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800361.

The product of its digits is 51840, while the sum is 39.

The square root of 1831361538 is about 42794.4101256227. The cubic root of 1831361538 is about 1223.4644734810.

The spelling of 1831361538 in words is "one billion, eight hundred thirty-one million, three hundred sixty-one thousand, five hundred thirty-eight".