11978490 has 16 divisors (see below), whose sum is σ = 28748448. Its totient is φ = 3194256.

The previous prime is 11978459. The next prime is 11978503. The reversal of 11978490 is 9487911.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199612 + ... + 199671.

It is an arithmetic number, because the mean of its divisors is an integer number (1796778).

Almost surely, 2^11978490 is an apocalyptic number.

11978490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11978490 is an abundant number, since it is smaller than the sum of its proper divisors (16769958).

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

11978490 is a wasteful number, since it uses less digits than its factorization.

11978490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399293.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 11978490 is about 3460.9955215227. The cubic root of 11978490 is about 228.8059733432.

The spelling of 11978490 in words is "eleven million, nine hundred seventy-eight thousand, four hundred ninety".