11981470 has 16 divisors (see below), whose sum is σ = 21606768. Its totient is φ = 4783680.

The previous prime is 11981443. The next prime is 11981587. The reversal of 11981470 is 7418911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8410 + ... + 9730.

It is an arithmetic number, because the mean of its divisors is an integer number (1350423).

Almost surely, 2^11981470 is an apocalyptic number.

11981470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11981470 is a deficient number, since it is larger than the sum of its proper divisors (9625298).

11981470 is a wasteful number, since it uses less digits than its factorization.

11981470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2235.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 11981470 is about 3461.4260067204. The cubic root of 11981470 is about 228.8249458309.

The spelling of 11981470 in words is "eleven million, nine hundred eighty-one thousand, four hundred seventy".