478420501 has 4 divisors (see below), whose sum is σ = 515222092. Its totient is φ = 441618912.

The previous prime is 478420487. The next prime is 478420517. The reversal of 478420501 is 105024874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 86974276 + 391446225 = 9326^2 + 19785^2 .

It is a cyclic number.

It is not a de Polignac number, because 478420501 - 2⁵ = 478420469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478420541) 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, 18400776 + ... + 18400801.

It is an arithmetic number, because the mean of its divisors is an integer number (128805523).

Almost surely, 2^478420501 is an apocalyptic number.

It is an amenable number.

478420501 is a deficient number, since it is larger than the sum of its proper divisors (36801591).

478420501 is a wasteful number, since it uses less digits than its factorization.

478420501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36801590.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 478420501 is about 21872.8256290768. The cubic root of 478420501 is about 782.1137609413.

The spelling of 478420501 in words is "four hundred seventy-eight million, four hundred twenty thousand, five hundred one".