478390090 has 16 divisors (see below), whose sum is σ = 890795880. Its totient is φ = 184757440.

The previous prime is 478390049. The next prime is 478390127. The reversal of 478390090 is 90093874.

It can be written as a sum of positive squares in 4 ways, for example, as 417752721 + 60637369 = 20439^2 + 7787^2 .

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, 824521 + ... + 825100.

Almost surely, 2^478390090 is an apocalyptic number.

478390090 is a deficient number, since it is larger than the sum of its proper divisors (412405790).

478390090 is a wasteful number, since it uses less digits than its factorization.

478390090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649657.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 478390090 is about 21872.1304403572. The cubic root of 478390090 is about 782.0971887937.

The spelling of 478390090 in words is "four hundred seventy-eight million, three hundred ninety thousand, ninety".