11391426 has 12 divisors (see below), whose sum is σ = 24681462. Its totient is φ = 3797136.

The previous prime is 11391421. The next prime is 11391427. The reversal of 11391426 is 62419311.

11391426 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8415801 + 2975625 = 2901^2 + 1725^2 .

It is a super-4 number, since 4×11391426⁴ (a number of 29 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11391426.

It is not an unprimeable number, because it can be changed into a prime (11391421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 316411 + ... + 316446.

Almost surely, 2^11391426 is an apocalyptic number.

11391426 is an abundant number, since it is smaller than the sum of its proper divisors (13290036).

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

11391426 is a wasteful number, since it uses less digits than its factorization.

11391426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632865 (or 632862 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 11391426 is about 3375.1186645806. The cubic root of 11391426 is about 225.0052739505.

The spelling of 11391426 in words is "eleven million, three hundred ninety-one thousand, four hundred twenty-six".