11981450 has 24 divisors (see below), whose sum is σ = 24001068. Its totient is φ = 4423680.

The previous prime is 11981443. The next prime is 11981587. The reversal of 11981450 is 5418911.

11981450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 2550409 + 9431041 = 1597^2 + 3071^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8567 + ... + 9866.

Almost surely, 2^11981450 is an apocalyptic number.

11981450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11981450 is an abundant number, since it is smaller than the sum of its proper divisors (12019618).

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

11981450 is a wasteful number, since it uses less digits than its factorization.

11981450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18458 (or 18453 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 11981450 is about 3461.4231177364. The cubic root of 11981450 is about 228.8248185093.

The spelling of 11981450 in words is "eleven million, nine hundred eighty-one thousand, four hundred fifty".