1286440238031 has 16 divisors (see below), whose sum is σ = 1944417095040. Its totient is φ = 749989450080.

The previous prime is 1286440238021. The next prime is 1286440238051. The reversal of 1286440238031 is 1308320446821.

It is not a de Polignac number, because 1286440238031 - 2⁶ = 1286440237967 is a prime.

It is a super-2 number, since 2×1286440238031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286440238021) 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, 868042605 + ... + 868044086.

It is an arithmetic number, because the mean of its divisors is an integer number (121526068440).

Almost surely, 2^{1286440238031} is an apocalyptic number.

1286440238031 is a deficient number, since it is larger than the sum of its proper divisors (657976857009).

1286440238031 is a wasteful number, since it uses less digits than its factorization.

1286440238031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736086726.

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 1286440238031 in words is "one trillion, two hundred eighty-six billion, four hundred forty million, two hundred thirty-eight thousand, thirty-one".