404245887 has 4 divisors (see below), whose sum is σ = 538994520. Its totient is φ = 269497256.

The previous prime is 404245871. The next prime is 404245889. The reversal of 404245887 is 788542404.

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 404245887 - 2⁴ = 404245871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404245889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67374312 + ... + 67374317.

It is an arithmetic number, because the mean of its divisors is an integer number (134748630).

Almost surely, 2^404245887 is an apocalyptic number.

404245887 is a deficient number, since it is larger than the sum of its proper divisors (134748633).

404245887 is a wasteful number, since it uses less digits than its factorization.

404245887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134748632.

The product of its (nonzero) digits is 286720, while the sum is 42.

The square root of 404245887 is about 20105.8669795659. The cubic root of 404245887 is about 739.4041264711.

The spelling of 404245887 in words is "four hundred four million, two hundred forty-five thousand, eight hundred eighty-seven".