1111156798 has 32 divisors (see below), whose sum is σ = 1742000256. Its totient is φ = 531191808.

The previous prime is 1111156789. The next prime is 1111156799. The reversal of 1111156798 is 8976511111.

It is a super-2 number, since 2×1111156798² = 2469338859483225608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1111156798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111156799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774690 + ... + 776122.

It is an arithmetic number, because the mean of its divisors is an integer number (54437508).

Almost surely, 2^1111156798 is an apocalyptic number.

1111156798 is a deficient number, since it is larger than the sum of its proper divisors (630843458).

1111156798 is a wasteful number, since it uses less digits than its factorization.

1111156798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668.

The product of its digits is 15120, while the sum is 40.

The square root of 1111156798 is about 33334.0186296222. The cubic root of 1111156798 is about 1035.7583644353.

The spelling of 1111156798 in words is "one billion, one hundred eleven million, one hundred fifty-six thousand, seven hundred ninety-eight".