404328215 has 4 divisors (see below), whose sum is σ = 485193864. Its totient is φ = 323462568.

The previous prime is 404328203. The next prime is 404328229. The reversal of 404328215 is 512823404.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 404328215 - 2²⁸ = 135892759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40432817 + ... + 40432826.

It is an arithmetic number, because the mean of its divisors is an integer number (121298466).

Almost surely, 2^404328215 is an apocalyptic number.

404328215 is a deficient number, since it is larger than the sum of its proper divisors (80865649).

404328215 is an equidigital number, since it uses as much as digits as its factorization.

404328215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80865648.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 404328215 is about 20107.9142379313. The cubic root of 404328215 is about 739.4543183080.

The spelling of 404328215 in words is "four hundred four million, three hundred twenty-eight thousand, two hundred fifteen".