1280405040232 has 16 divisors (see below), whose sum is σ = 2406012760260. Its totient is φ = 638801637504.

The previous prime is 1280405040193. The next prime is 1280405040247. The reversal of 1280405040232 is 2320405040821.

It can be written as a sum of positive squares in 2 ways, for example, as 1280323932196 + 81108036 = 1131514^2 + 9006^2 .

It is a super-2 number, since 2×1280405040232² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1280405040194 and 1280405040203.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175106443 + ... + 175113754.

Almost surely, 2^{1280405040232} is an apocalyptic number.

It is an amenable number.

1280405040232 is a deficient number, since it is larger than the sum of its proper divisors (1125607720028).

1280405040232 is a wasteful number, since it uses less digits than its factorization.

1280405040232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350220660 (or 350220656 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The spelling of 1280405040232 in words is "one trillion, two hundred eighty billion, four hundred five million, forty thousand, two hundred thirty-two".