11978406 has 24 divisors (see below), whose sum is σ = 28313064. Its totient is φ = 3629760.

The previous prime is 11978401. The next prime is 11978411. The reversal of 11978406 is 60487911.

It is an interprime number because it is at equal distance from previous prime (11978401) and next prime (11978411).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30051 + ... + 30446.

It is an arithmetic number, because the mean of its divisors is an integer number (1179711).

Almost surely, 2^11978406 is an apocalyptic number.

11978406 is an abundant number, since it is smaller than the sum of its proper divisors (16334658).

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

11978406 is a wasteful number, since it uses less digits than its factorization.

11978406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60516 (or 60513 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 11978406 is about 3460.9833862647. The cubic root of 11978406 is about 228.8054385026.

The spelling of 11978406 in words is "eleven million, nine hundred seventy-eight thousand, four hundred six".