1868339557 has 16 divisors (see below), whose sum is σ = 2158940160. Its totient is φ = 1583706672.

The previous prime is 1868339533. The next prime is 1868339567. The reversal of 1868339557 is 7559338681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1868339557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1868339498 and 1868339507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868339567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 733428 + ... + 735970.

It is an arithmetic number, because the mean of its divisors is an integer number (134933760).

Almost surely, 2^1868339557 is an apocalyptic number.

It is an amenable number.

1868339557 is a deficient number, since it is larger than the sum of its proper divisors (290600603).

1868339557 is a wasteful number, since it uses less digits than its factorization.

1868339557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672.

The product of its digits is 5443200, while the sum is 55.

The square root of 1868339557 is about 43224.2935974667. The cubic root of 1868339557 is about 1231.6442102163.

The spelling of 1868339557 in words is "one billion, eight hundred sixty-eight million, three hundred thirty-nine thousand, five hundred fifty-seven".