11551380 has 48 divisors (see below), whose sum is σ = 32766720. Its totient is φ = 3040128.

The previous prime is 11551369. The next prime is 11551409. The reversal of 11551380 is 8315511.

It is a self number, because there is not a number n which added to its sum of digits gives 11551380.

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, 3522 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (682640).

Almost surely, 2^11551380 is an apocalyptic number.

11551380 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 11551380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16383360).

11551380 is an abundant number, since it is smaller than the sum of its proper divisors (21215340).

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

11551380 is a wasteful number, since it uses less digits than its factorization.

11551380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528 (or 2526 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 11551380 is about 3398.7321165399. The cubic root of 11551380 is about 226.0535284490.

Adding to 11551380 its reverse (8315511), we get a palindrome (19866891).

The spelling of 11551380 in words is "eleven million, five hundred fifty-one thousand, three hundred eighty".