1831440788428 has 12 divisors (see below), whose sum is σ = 3393552049272. Its totient is φ = 861854488640.

The previous prime is 1831440788399. The next prime is 1831440788453. The reversal of 1831440788428 is 8248870441381.

It is a happy number.

It is a super-2 number, since 2×1831440788428² (a number of 25 digits) contains 22 as substring.

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, 13466476318 + ... + 13466476453.

It is an arithmetic number, because the mean of its divisors is an integer number (282796004106).

Almost surely, 2^{1831440788428} is an apocalyptic number.

It is an amenable number.

1831440788428 is a deficient number, since it is larger than the sum of its proper divisors (1562111260844).

1831440788428 is a wasteful number, since it uses less digits than its factorization.

1831440788428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26932952792 (or 26932952790 counting only the distinct ones).

The product of its (nonzero) digits is 11010048, while the sum is 58.

The spelling of 1831440788428 in words is "one trillion, eight hundred thirty-one billion, four hundred forty million, seven hundred eighty-eight thousand, four hundred twenty-eight".