11978458 has 8 divisors (see below), whose sum is σ = 18099252. Its totient is φ = 5945376.

The previous prime is 11978443. The next prime is 11978459. The reversal of 11978458 is 85487911.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10093329 + 1885129 = 3177^2 + 1373^2 .

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

It is a nialpdrome in base 8.

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 3 ways as a sum of consecutive naturals, for example, 21585 + ... + 22132.

Almost surely, 2^11978458 is an apocalyptic number.

11978458 is a deficient number, since it is larger than the sum of its proper divisors (6120794).

11978458 is a wasteful number, since it uses less digits than its factorization.

11978458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43856.

The product of its digits is 80640, while the sum is 43.

The square root of 11978458 is about 3460.9908985723. The cubic root of 11978458 is about 228.8057695947.

The spelling of 11978458 in words is "eleven million, nine hundred seventy-eight thousand, four hundred fifty-eight".