11980538 has 16 divisors (see below), whose sum is σ = 18874080. Its totient is φ = 5695536.

The previous prime is 11980537. The next prime is 11980543. The reversal of 11980538 is 83508911.

It is a junction number, because it is equal to n+sod(n) for n = 11980498 and 11980507.

It is not an unprimeable number, because it can be changed into a prime (11980537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2345 + ... + 5427.

It is an arithmetic number, because the mean of its divisors is an integer number (1179630).

Almost surely, 2^11980538 is an apocalyptic number.

11980538 is a deficient number, since it is larger than the sum of its proper divisors (6893542).

11980538 is a wasteful number, since it uses less digits than its factorization.

11980538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 11980538 is about 3461.2913775064. The cubic root of 11980538 is about 228.8190124917.

The spelling of 11980538 in words is "eleven million, nine hundred eighty thousand, five hundred thirty-eight".