11978562 has 8 divisors (see below), whose sum is σ = 23957136. Its totient is φ = 3992852.

The previous prime is 11978539. The next prime is 11978567. The reversal of 11978562 is 26587911.

11978562 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

11978562 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 11978562.

It is not an unprimeable number, because it can be changed into a prime (11978567) 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, 998208 + ... + 998219.

It is an arithmetic number, because the mean of its divisors is an integer number (2994642).

Almost surely, 2^11978562 is an apocalyptic number.

11978562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11978562 is a wasteful number, since it uses less digits than its factorization.

11978562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996432.

The product of its digits is 30240, while the sum is 39.

The square root of 11978562 is about 3461.0059231385. The cubic root of 11978562 is about 228.8064317759.

The spelling of 11978562 in words is "eleven million, nine hundred seventy-eight thousand, five hundred sixty-two".