478615947 has 32 divisors (see below), whose sum is σ = 705169920. Its totient is φ = 287400960.

The previous prime is 478615937. The next prime is 478615957. The reversal of 478615947 is 749516874.

It is an interprime number because it is at equal distance from previous prime (478615937) and next prime (478615957).

It is not a de Polignac number, because 478615947 - 2¹¹ = 478613899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478615947.

It is not an unprimeable number, because it can be changed into a prime (478615927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236283 + ... + 238299.

It is an arithmetic number, because the mean of its divisors is an integer number (22036560).

Almost surely, 2^478615947 is an apocalyptic number.

478615947 is a deficient number, since it is larger than the sum of its proper divisors (226553973).

478615947 is a wasteful number, since it uses less digits than its factorization.

478615947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243.

The product of its digits is 1693440, while the sum is 51.

The square root of 478615947 is about 21877.2929541111. The cubic root of 478615947 is about 782.2202503823.

The spelling of 478615947 in words is "four hundred seventy-eight million, six hundred fifteen thousand, nine hundred forty-seven".