1280228957858 has 16 divisors (see below), whose sum is σ = 1983133393920. Its totient is φ = 619202064000.

The previous prime is 1280228957803. The next prime is 1280228957899. The reversal of 1280228957858 is 8587598220821.

It is a junction number, because it is equal to n+sod(n) for n = 1280228957794 and 1280228957803.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4245743 + ... + 4537266.

It is an arithmetic number, because the mean of its divisors is an integer number (123945837120).

Almost surely, 2^{1280228957858} is an apocalyptic number.

1280228957858 is a deficient number, since it is larger than the sum of its proper divisors (702904436062).

1280228957858 is a wasteful number, since it uses less digits than its factorization.

1280228957858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785393.

The product of its (nonzero) digits is 51609600, while the sum is 65.

The spelling of 1280228957858 in words is "one trillion, two hundred eighty billion, two hundred twenty-eight million, nine hundred fifty-seven thousand, eight hundred fifty-eight".