1115643478 has 8 divisors (see below), whose sum is σ = 1678127760. Its totient is φ = 556267560.

The previous prime is 1115643443. The next prime is 1115643493. The reversal of 1115643478 is 8743465111.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1115643478.

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, 776193 + ... + 777628.

It is an arithmetic number, because the mean of its divisors is an integer number (209765970).

Almost surely, 2^1115643478 is an apocalyptic number.

1115643478 is a deficient number, since it is larger than the sum of its proper divisors (562484282).

1115643478 is a wasteful number, since it uses less digits than its factorization.

1115643478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554182.

The product of its digits is 80640, while the sum is 40.

The square root of 1115643478 is about 33401.2496472812. The cubic root of 1115643478 is about 1037.1505698559.

The spelling of 1115643478 in words is "one billion, one hundred fifteen million, six hundred forty-three thousand, four hundred seventy-eight".