478827638 has 4 divisors (see below), whose sum is σ = 718241460. Its totient is φ = 239413818.

The previous prime is 478827571. The next prime is 478827667. The reversal of 478827638 is 836728874.

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

It is a self number, because there is not a number n which added to its sum of digits gives 478827638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119706908 + ... + 119706911.

It is an arithmetic number, because the mean of its divisors is an integer number (179560365).

Almost surely, 2^478827638 is an apocalyptic number.

478827638 is a deficient number, since it is larger than the sum of its proper divisors (239413822).

478827638 is a wasteful number, since it uses less digits than its factorization.

478827638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239413821.

The product of its digits is 3612672, while the sum is 53.

The square root of 478827638 is about 21882.1305635443. The cubic root of 478827638 is about 782.3355582687.

The spelling of 478827638 in words is "four hundred seventy-eight million, eight hundred twenty-seven thousand, six hundred thirty-eight".