478128371 has 4 divisors (see below), whose sum is σ = 546432432. Its totient is φ = 409824312.

The previous prime is 478128359. The next prime is 478128397. The reversal of 478128371 is 173821874.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478128371 is a prime.

It is a super-2 number, since 2×478128371² = 457213478310227282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (478128311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34152020 + ... + 34152033.

It is an arithmetic number, because the mean of its divisors is an integer number (136608108).

Almost surely, 2^478128371 is an apocalyptic number.

478128371 is a deficient number, since it is larger than the sum of its proper divisors (68304061).

478128371 is an equidigital number, since it uses as much as digits as its factorization.

478128371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68304060.

The product of its digits is 75264, while the sum is 41.

The square root of 478128371 is about 21866.1466884314. The cubic root of 478128371 is about 781.9545387979.

The spelling of 478128371 in words is "four hundred seventy-eight million, one hundred twenty-eight thousand, three hundred seventy-one".