1091204144 has 20 divisors (see below), whose sum is σ = 2115006000. Its totient is φ = 545396160.

The previous prime is 1091204137. The next prime is 1091204159. The reversal of 1091204144 is 4414021901.

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, 36614 + ... + 59354.

It is an arithmetic number, because the mean of its divisors is an integer number (105750300).

Almost surely, 2^1091204144 is an apocalyptic number.

It is an amenable number.

1091204144 is a deficient number, since it is larger than the sum of its proper divisors (1023801856).

1091204144 is a wasteful number, since it uses less digits than its factorization.

1091204144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25748 (or 25742 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1091204144 is about 33033.3792397932. The cubic root of 1091204144 is about 1029.5212982750.

The spelling of 1091204144 in words is "one billion, ninety-one million, two hundred four thousand, one hundred forty-four".