1129920394 has 8 divisors (see below), whose sum is σ = 1736219268. Its totient is φ = 551180640.

The previous prime is 1129920377. The next prime is 1129920413. The reversal of 1129920394 is 4930299211.

It can be written as a sum of positive squares in 2 ways, for example, as 1040901169 + 89019225 = 32263^2 + 9435^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 6889677 + ... + 6889840.

Almost surely, 2^1129920394 is an apocalyptic number.

1129920394 is a deficient number, since it is larger than the sum of its proper divisors (606298874).

1129920394 is a wasteful number, since it uses less digits than its factorization.

1129920394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13779560.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 1129920394 is about 33614.2885392507. The cubic root of 1129920394 is about 1041.5559777197. Note that the first 3 decimals are identical.

The spelling of 1129920394 in words is "one billion, one hundred twenty-nine million, nine hundred twenty thousand, three hundred ninety-four".