11771240 has 32 divisors (see below), whose sum is σ = 28523880. Its totient is φ = 4346112.

The previous prime is 11771213. The next prime is 11771257. The reversal of 11771240 is 4217711.

It can be written as a sum of positive squares in 4 ways, for example, as 5943844 + 5827396 = 2438^2 + 2414^2 .

It is a super-2 number, since 2×11771240² = 277124182275200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10799 + ... + 11838.

Almost surely, 2^11771240 is an apocalyptic number.

11771240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11771240 is an abundant number, since it is smaller than the sum of its proper divisors (16752640).

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

11771240 is a wasteful number, since it uses less digits than its factorization.

11771240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22661 (or 22657 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 23.

The square root of 11771240 is about 3430.9240737737. The cubic root of 11771240 is about 227.4787002560.

Adding to 11771240 its reverse (4217711), we get a palindrome (15988951).

The spelling of 11771240 in words is "eleven million, seven hundred seventy-one thousand, two hundred forty".