1117198578 has 16 divisors (see below), whose sum is σ = 2235437856. Its totient is φ = 372226080.

The previous prime is 1117198559. The next prime is 1117198597. The reversal of 1117198578 is 8758917111.

It is an interprime number because it is at equal distance from previous prime (1117198559) and next prime (1117198597).

It is a Curzon number.

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, 29043 + ... + 55478.

It is an arithmetic number, because the mean of its divisors is an integer number (139714866).

Almost surely, 2^1117198578 is an apocalyptic number.

1117198578 is an abundant number, since it is smaller than the sum of its proper divisors (1118239278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1117198578 is a wasteful number, since it uses less digits than its factorization.

1117198578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86729.

The product of its digits is 141120, while the sum is 48.

The square root of 1117198578 is about 33424.5206098756. The cubic root of 1117198578 is about 1037.6322422618.

The spelling of 1117198578 in words is "one billion, one hundred seventeen million, one hundred ninety-eight thousand, five hundred seventy-eight".