478006990 has 16 divisors (see below), whose sum is σ = 862112160. Its totient is φ = 190825120.

The previous prime is 478006981. The next prime is 478007021. The reversal of 478006990 is 99600874.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41866 + ... + 52045.

It is an arithmetic number, because the mean of its divisors is an integer number (53882010).

Almost surely, 2^478006990 is an apocalyptic number.

478006990 is a deficient number, since it is larger than the sum of its proper divisors (384105170).

478006990 is a wasteful number, since it uses less digits than its factorization.

478006990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94427.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 478006990 is about 21863.3709660702. The cubic root of 478006990 is about 781.8883623882. Note that the first 3 decimals are identical.

The spelling of 478006990 in words is "four hundred seventy-eight million, six thousand, nine hundred ninety".