478340641 has 3 divisors (see below), whose sum is σ = 478362513. Its totient is φ = 478318770.

The previous prime is 478340627. The next prime is 478340647. The reversal of 478340641 is 146043874.

The square root of 478340641 is 21871.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 478340641 - 2¹¹ = 478338593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478340641.

It is not an unprimeable number, because it can be changed into a prime (478340647) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10936 + ... + 32806.

It is an arithmetic number, because the mean of its divisors is an integer number (159454171).

Almost surely, 2^478340641 is an apocalyptic number.

478340641 is the 21871-st square number.

478340641 is the 10936-th centered octagonal number.

It is an amenable number.

478340641 is a deficient number, since it is larger than the sum of its proper divisors (21872).

478340641 is an frugal number, since it uses more digits than its factorization.

478340641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43742 (or 21871 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The cubic root of 478340641 is about 782.0702405930.

The spelling of 478340641 in words is "four hundred seventy-eight million, three hundred forty thousand, six hundred forty-one".