11128931 has 8 divisors (see below), whose sum is σ = 12855024. Its totient is φ = 9521920.

The previous prime is 11128913. The next prime is 11128937. The reversal of 11128931 is 13982111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11128931 is a prime.

It is a super-2 number, since 2×11128931² = 247706210405522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11128931.

It is not an unprimeable number, because it can be changed into a prime (11128937) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 29570 + ... + 29943.

It is an arithmetic number, because the mean of its divisors is an integer number (1606878).

Almost surely, 2^11128931 is an apocalyptic number.

11128931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11128931 is a deficient number, since it is larger than the sum of its proper divisors (1726093).

11128931 is a wasteful number, since it uses less digits than its factorization.

11128931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59541.

The product of its digits is 432, while the sum is 26.

The square root of 11128931 is about 3336.0052457992. The cubic root of 11128931 is about 223.2635451855.

The spelling of 11128931 in words is "eleven million, one hundred twenty-eight thousand, nine hundred thirty-one".