11400534 has 32 divisors (see below), whose sum is σ = 25757280. Its totient is φ = 3736800.

The previous prime is 11400533. The next prime is 11400563. The reversal of 11400534 is 43500411.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11400533) 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, 1564 + ... + 5024.

It is an arithmetic number, because the mean of its divisors is an integer number (804915).

Almost surely, 2^11400534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11400534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12878640).

11400534 is an abundant number, since it is smaller than the sum of its proper divisors (14356746).

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

11400534 is a wasteful number, since it uses less digits than its factorization.

11400534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533 (or 3527 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 11400534 is about 3376.4676808760. The cubic root of 11400534 is about 225.0652255343.

Adding to 11400534 its reverse (43500411), we get a palindrome (54900945).

The spelling of 11400534 in words is "eleven million, four hundred thousand, five hundred thirty-four".