1091198604 has 12 divisors (see below), whose sum is σ = 2546130104. Its totient is φ = 363732864.

The previous prime is 1091198587. The next prime is 1091198611. The reversal of 1091198604 is 4068911901.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 45466597 + ... + 45466620.

Almost surely, 2^1091198604 is an apocalyptic number.

It is an amenable number.

1091198604 is an abundant number, since it is smaller than the sum of its proper divisors (1454931500).

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

1091198604 is a wasteful number, since it uses less digits than its factorization.

1091198604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90933224 (or 90933222 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 1091198604 is about 33033.2953851111. The cubic root of 1091198604 is about 1029.5195559925.

The spelling of 1091198604 in words is "one billion, ninety-one million, one hundred ninety-eight thousand, six hundred four".