11978455 has 16 divisors (see below), whose sum is σ = 16022880. Its totient is φ = 8543232.

The previous prime is 11978443. The next prime is 11978459. The reversal of 11978455 is 55487911.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11978455 - 2¹¹ = 11976407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2094 + ... + 5323.

It is an arithmetic number, because the mean of its divisors is an integer number (1001430).

Almost surely, 2^11978455 is an apocalyptic number.

11978455 is a deficient number, since it is larger than the sum of its proper divisors (4044425).

11978455 is a wasteful number, since it uses less digits than its factorization.

11978455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7458.

The product of its digits is 50400, while the sum is 40.

The square root of 11978455 is about 3460.9904651703. The cubic root of 11978455 is about 228.8057504932.

The spelling of 11978455 in words is "eleven million, nine hundred seventy-eight thousand, four hundred fifty-five".