11989582 has 16 divisors (see below), whose sum is σ = 19701504. Its totient is φ = 5427000.

The previous prime is 11989553. The next prime is 11989597. The reversal of 11989582 is 28598911.

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, 4957 + ... + 6967.

It is an arithmetic number, because the mean of its divisors is an integer number (1231344).

Almost surely, 2^11989582 is an apocalyptic number.

11989582 is a deficient number, since it is larger than the sum of its proper divisors (7711922).

11989582 is a wasteful number, since it uses less digits than its factorization.

11989582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295.

The product of its digits is 51840, while the sum is 43.

The square root of 11989582 is about 3462.5975798524. The cubic root of 11989582 is about 228.8765758118.

It can be divided in two parts, 1198 and 9582, that multiplied together give a triangular number (11479236 = T₄₇₉₁).

The spelling of 11989582 in words is "eleven million, nine hundred eighty-nine thousand, five hundred eighty-two".