478951906 has 4 divisors (see below), whose sum is σ = 718427862. Its totient is φ = 239475952.

The previous prime is 478951903. The next prime is 478951909. The reversal of 478951906 is 609159874.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (478951903) and next prime (478951909).

It can be written as a sum of positive squares in only one way, i.e., 466171281 + 12780625 = 21591^2 + 3575^2 .

It is a super-2 number, since 2×478951906² = 458789856522065672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 478951906.

It is not an unprimeable number, because it can be changed into a prime (478951901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119737975 + ... + 119737978.

Almost surely, 2^478951906 is an apocalyptic number.

478951906 is a deficient number, since it is larger than the sum of its proper divisors (239475956).

478951906 is a wasteful number, since it uses less digits than its factorization.

478951906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239475955.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 478951906 is about 21884.9698651837. The cubic root of 478951906 is about 782.4032311001.

The spelling of 478951906 in words is "four hundred seventy-eight million, nine hundred fifty-one thousand, nine hundred six".