11489978 has 8 divisors (see below), whose sum is σ = 17253972. Its totient is φ = 5738656.

The previous prime is 11489971. The next prime is 11489983. The reversal of 11489978 is 87998411.

It can be written as a sum of positive squares in 2 ways, for example, as 11404129 + 85849 = 3377^2 + 293^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11489971) 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, 425 + ... + 4812.

Almost surely, 2^11489978 is an apocalyptic number.

11489978 is a deficient number, since it is larger than the sum of its proper divisors (5763994).

11489978 is a wasteful number, since it uses less digits than its factorization.

11489978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6336.

The product of its digits is 145152, while the sum is 47.

The square root of 11489978 is about 3389.6870061998. The cubic root of 11489978 is about 225.6522833109.

The spelling of 11489978 in words is "eleven million, four hundred eighty-nine thousand, nine hundred seventy-eight".