11271380 has 48 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 4253568.

The previous prime is 11271367. The next prime is 11271437. The reversal of 11271380 is 8317211.

11271380 = T₃₈₄ + T₃₈₅ + ... + T₄₉₈.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49106 + ... + 49334.

It is an arithmetic number, because the mean of its divisors is an integer number (521640).

Almost surely, 2^11271380 is an apocalyptic number.

11271380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11271380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12519360).

11271380 is an abundant number, since it is smaller than the sum of its proper divisors (13767340).

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

11271380 is a wasteful number, since it uses less digits than its factorization.

11271380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 11271380 is about 3357.2875956641. The cubic root of 11271380 is about 224.2120918495.

Adding to 11271380 its reverse (8317211), we get a palindrome (19588591).

The spelling of 11271380 in words is "eleven million, two hundred seventy-one thousand, three hundred eighty".