407478385 has 4 divisors (see below), whose sum is σ = 488974068. Its totient is φ = 325982704.

The previous prime is 407478371. The next prime is 407478397. The reversal of 407478385 is 583874704.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99440784 + 308037601 = 9972^2 + 17551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-407478385 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40747834 + ... + 40747843.

It is an arithmetic number, because the mean of its divisors is an integer number (122243517).

Almost surely, 2^407478385 is an apocalyptic number.

It is an amenable number.

407478385 is a deficient number, since it is larger than the sum of its proper divisors (81495683).

407478385 is an equidigital number, since it uses as much as digits as its factorization.

407478385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81495682.

The product of its (nonzero) digits is 752640, while the sum is 46.

The square root of 407478385 is about 20186.0938519566. The cubic root of 407478385 is about 741.3697451074.

The spelling of 407478385 in words is "four hundred seven million, four hundred seventy-eight thousand, three hundred eighty-five".