1091949306 has 32 divisors (see below), whose sum is σ = 2498594688. Its totient is φ = 311646720.

The previous prime is 1091949293. The next prime is 1091949307. The reversal of 1091949306 is 6039491901.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1091949307) 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, 26386 + ... + 53666.

It is an arithmetic number, because the mean of its divisors is an integer number (78081084).

Almost surely, 2^1091949306 is an apocalyptic number.

1091949306 is an abundant number, since it is smaller than the sum of its proper divisors (1406645382).

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

1091949306 is a wasteful number, since it uses less digits than its factorization.

1091949306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28246.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 1091949306 is about 33044.6562397008. The cubic root of 1091949306 is about 1029.7555916147.

The spelling of 1091949306 in words is "one billion, ninety-one million, nine hundred forty-nine thousand, three hundred six".