11978662 has 8 divisors (see below), whose sum is σ = 18236376. Its totient is φ = 5899872.

The previous prime is 11978657. The next prime is 11978663. The reversal of 11978662 is 26687911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44563 + ... + 44830.

It is an arithmetic number, because the mean of its divisors is an integer number (2279547).

Almost surely, 2^11978662 is an apocalyptic number.

11978662 is a deficient number, since it is larger than the sum of its proper divisors (6257714).

11978662 is an equidigital number, since it uses as much as digits as its factorization.

11978662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89462.

The product of its digits is 36288, while the sum is 40.

The square root of 11978662 is about 3461.0203697754. The cubic root of 11978662 is about 228.8070684851.

The spelling of 11978662 in words is "eleven million, nine hundred seventy-eight thousand, six hundred sixty-two".