11156439 has 16 divisors (see below), whose sum is σ = 17895680. Its totient is φ = 6039360.

The previous prime is 11156429. The next prime is 11156441. The reversal of 11156439 is 93465111.

It is not a de Polignac number, because 11156439 - 2⁴ = 11156423 is a prime.

It is a super-2 number, since 2×11156439² = 248932262321442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11156429) 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, 13582 + ... + 14379.

It is an arithmetic number, because the mean of its divisors is an integer number (1118480).

Almost surely, 2^11156439 is an apocalyptic number.

11156439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11156439 is a deficient number, since it is larger than the sum of its proper divisors (6739241).

11156439 is a wasteful number, since it uses less digits than its factorization.

11156439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27990.

The product of its digits is 3240, while the sum is 30.

The square root of 11156439 is about 3340.1255964409. The cubic root of 11156439 is about 223.4473448219.

The spelling of 11156439 in words is "eleven million, one hundred fifty-six thousand, four hundred thirty-nine".