1538734238 has 4 divisors (see below), whose sum is σ = 2308101360. Its totient is φ = 769367118.

The previous prime is 1538734193. The next prime is 1538734273. The reversal of 1538734238 is 8324378351.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384683558 + ... + 384683561.

It is an arithmetic number, because the mean of its divisors is an integer number (577025340).

Almost surely, 2^1538734238 is an apocalyptic number.

1538734238 is a deficient number, since it is larger than the sum of its proper divisors (769367122).

1538734238 is an equidigital number, since it uses as much as digits as its factorization.

1538734238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769367121.

The product of its digits is 483840, while the sum is 44.

The square root of 1538734238 is about 39226.7031242749. The cubic root of 1538734238 is about 1154.4838777692.

The spelling of 1538734238 in words is "one billion, five hundred thirty-eight million, seven hundred thirty-four thousand, two hundred thirty-eight".