1109494778 has 32 divisors (see below), whose sum is σ = 2004272640. Its totient is φ = 449982000.

The previous prime is 1109494753. The next prime is 1109494787. The reversal of 1109494778 is 8774949011.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339653 + ... + 342903.

It is an arithmetic number, because the mean of its divisors is an integer number (62633520).

Almost surely, 2^1109494778 is an apocalyptic number.

1109494778 is a deficient number, since it is larger than the sum of its proper divisors (894777862).

1109494778 is a wasteful number, since it uses less digits than its factorization.

1109494778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 1109494778 is about 33309.0795129496. The cubic root of 1109494778 is about 1035.2416926436.

The spelling of 1109494778 in words is "one billion, one hundred nine million, four hundred ninety-four thousand, seven hundred seventy-eight".