404142775 has 18 divisors (see below), whose sum is σ = 523890080. Its totient is φ = 309246960.

The previous prime is 404142757. The next prime is 404142793. The reversal of 404142775 is 577241404.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (404142757) and next prime (404142793).

It is not a de Polignac number, because 404142775 - 2⁷ = 404142647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404142775.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2055 + ... + 28504.

Almost surely, 2^404142775 is an apocalyptic number.

404142775 is a deficient number, since it is larger than the sum of its proper divisors (119747305).

404142775 is a wasteful number, since it uses less digits than its factorization.

404142775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30615 (or 30587 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 34.

The square root of 404142775 is about 20103.3025893757. The cubic root of 404142775 is about 739.3412539109.

The spelling of 404142775 in words is "four hundred four million, one hundred forty-two thousand, seven hundred seventy-five".