1281730838 has 8 divisors (see below), whose sum is σ = 1974558432. Its totient is φ = 623544696.

The previous prime is 1281730829. The next prime is 1281730859. The reversal of 1281730838 is 8380371821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1281730795 and 1281730804.

It is a congruent number.

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, 8660270 + ... + 8660417.

It is an arithmetic number, because the mean of its divisors is an integer number (246819804).

Almost surely, 2^1281730838 is an apocalyptic number.

1281730838 is a deficient number, since it is larger than the sum of its proper divisors (692827594).

1281730838 is a wasteful number, since it uses less digits than its factorization.

1281730838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17320726.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 1281730838 is about 35801.2686646716. The cubic root of 1281730838 is about 1086.2562238336.

The spelling of 1281730838 in words is "one billion, two hundred eighty-one million, seven hundred thirty thousand, eight hundred thirty-eight".