1591144338 has 16 divisors (see below), whose sum is σ = 3636901440. Its totient is φ = 454612656.

The previous prime is 1591144333. The next prime is 1591144367. The reversal of 1591144338 is 8334411951.

It is a junction number, because it is equal to n+sod(n) for n = 1591144296 and 1591144305.

It is not an unprimeable number, because it can be changed into a prime (1591144333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18942153 + ... + 18942236.

It is an arithmetic number, because the mean of its divisors is an integer number (227306340).

Almost surely, 2^1591144338 is an apocalyptic number.

1591144338 is an abundant number, since it is smaller than the sum of its proper divisors (2045757102).

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

1591144338 is a wasteful number, since it uses less digits than its factorization.

1591144338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37884401.

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

The square root of 1591144338 is about 39889.1506302152. The cubic root of 1591144338 is about 1167.4452591996.

The spelling of 1591144338 in words is "one billion, five hundred ninety-one million, one hundred forty-four thousand, three hundred thirty-eight".