11955380 has 12 divisors (see below), whose sum is σ = 25106340. Its totient is φ = 4782144.

The previous prime is 11955373. The next prime is 11955397. The reversal of 11955380 is 8355911.

It can be written as a sum of positive squares in 2 ways, for example, as 8042896 + 3912484 = 2836^2 + 1978^2 .

It is a super-2 number, since 2×11955380² = 285862221888800, 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 3 ways as a sum of consecutive naturals, for example, 298865 + ... + 298904.

It is an arithmetic number, because the mean of its divisors is an integer number (2092195).

Almost surely, 2^11955380 is an apocalyptic number.

11955380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11955380 is an abundant number, since it is smaller than the sum of its proper divisors (13150960).

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

11955380 is a wasteful number, since it uses less digits than its factorization.

11955380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597778 (or 597776 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 11955380 is about 3457.6552748937. The cubic root of 11955380 is about 228.6587341335.

The spelling of 11955380 in words is "eleven million, nine hundred fifty-five thousand, three hundred eighty".