404020351 has 16 divisors (see below), whose sum is σ = 514632960. Its totient is φ = 308776320.

The previous prime is 404020343. The next prime is 404020361. The reversal of 404020351 is 153020404.

It is a cyclic number.

It is not a de Polignac number, because 404020351 - 2³ = 404020343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404020361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87085 + ... + 91606.

It is an arithmetic number, because the mean of its divisors is an integer number (32164560).

Almost surely, 2^404020351 is an apocalyptic number.

404020351 is a deficient number, since it is larger than the sum of its proper divisors (110612609).

404020351 is a wasteful number, since it uses less digits than its factorization.

404020351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178734.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 404020351 is about 20100.2574859130. The cubic root of 404020351 is about 739.2665919677.

Adding to 404020351 its reverse (153020404), we get a palindrome (557040755).

The spelling of 404020351 in words is "four hundred four million, twenty thousand, three hundred fifty-one".