11431340 has 24 divisors (see below), whose sum is σ = 24518592. Its totient is φ = 4474880.

The previous prime is 11431297. The next prime is 11431349. The reversal of 11431340 is 4313411.

It is not an unprimeable number, because it can be changed into a prime (11431349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5141 + ... + 7020.

It is an arithmetic number, because the mean of its divisors is an integer number (1021608).

Almost surely, 2^11431340 is an apocalyptic number.

11431340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11431340 is an abundant number, since it is smaller than the sum of its proper divisors (13087252).

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

11431340 is a wasteful number, since it uses less digits than its factorization.

11431340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12217 (or 12215 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 11431340 is about 3381.0264713545. The cubic root of 11431340 is about 225.2677635234.

Adding to 11431340 its reverse (4313411), we get a palindrome (15744751).

It can be divided in two parts, 11 and 431340, that multiplied together give a triangular number (4744740 = T₃₀₈₀).

The spelling of 11431340 in words is "eleven million, four hundred thirty-one thousand, three hundred forty".