1538792668 has 48 divisors (see below), whose sum is σ = 3213548800. Its totient is φ = 644121072.

The previous prime is 1538792599. The next prime is 1538792669. The reversal of 1538792668 is 8662978351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538792669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45955 + ... + 72037.

Almost surely, 2^1538792668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538792668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606774400).

1538792668 is an abundant number, since it is smaller than the sum of its proper divisors (1674756132).

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

1538792668 is a wasteful number, since it uses less digits than its factorization.

1538792668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26151 (or 26135 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The square root of 1538792668 is about 39227.4478904759. The cubic root of 1538792668 is about 1154.4984905675.

The spelling of 1538792668 in words is "one billion, five hundred thirty-eight million, seven hundred ninety-two thousand, six hundred sixty-eight".