1090778604 has 24 divisors (see below), whose sum is σ = 2567676720. Its totient is φ = 360374784.

The previous prime is 1090778597. The next prime is 1090778621. The reversal of 1090778604 is 4068770901.

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, 400849 + ... + 403560.

It is an arithmetic number, because the mean of its divisors is an integer number (106986530).

Almost surely, 2^1090778604 is an apocalyptic number.

It is an amenable number.

1090778604 is an abundant number, since it is smaller than the sum of its proper divisors (1476898116).

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

1090778604 is a wasteful number, since it uses less digits than its factorization.

1090778604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804529 (or 804527 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1090778604 is about 33026.9375510355. The cubic root of 1090778604 is about 1029.3874524199.

The spelling of 1090778604 in words is "one billion, ninety million, seven hundred seventy-eight thousand, six hundred four".