478640326 has 4 divisors (see below), whose sum is σ = 717960492. Its totient is φ = 239320162.

The previous prime is 478640317. The next prime is 478640329. The reversal of 478640326 is 623046874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 623046874 = 2 ⋅311523437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478640329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119660080 + ... + 119660083.

It is an arithmetic number, because the mean of its divisors is an integer number (179490123).

Almost surely, 2^478640326 is an apocalyptic number.

478640326 is a deficient number, since it is larger than the sum of its proper divisors (239320166).

478640326 is a wasteful number, since it uses less digits than its factorization.

478640326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239320165.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 478640326 is about 21877.8501228983. The cubic root of 478640326 is about 782.2335313325.

The spelling of 478640326 in words is "four hundred seventy-eight million, six hundred forty thousand, three hundred twenty-six".