1099381376 has 16 divisors (see below), whose sum is σ = 2190174090. Its totient is φ = 549690624.

The previous prime is 1099381369. The next prime is 1099381391. The reversal of 1099381376 is 6731839901.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 869070400 + 230310976 = 29480^2 + 15176^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 1099381376.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4294331 + ... + 4294586.

Almost surely, 2^1099381376 is an apocalyptic number.

1099381376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1099381376 is a deficient number, since it is larger than the sum of its proper divisors (1090792714).

1099381376 is an frugal number, since it uses more digits than its factorization.

1099381376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8588931 (or 8588919 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1099381376 is about 33156.9204842669. The cubic root of 1099381376 is about 1032.0865660614.

The spelling of 1099381376 in words is "one billion, ninety-nine million, three hundred eighty-one thousand, three hundred seventy-six".