404240386 has 16 divisors (see below), whose sum is σ = 664237728. Its totient is φ = 182980800.

The previous prime is 404240383. The next prime is 404240401. The reversal of 404240386 is 683042404.

It is not an unprimeable number, because it can be changed into a prime (404240383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32820 + ... + 43423.

It is an arithmetic number, because the mean of its divisors is an integer number (41514858).

Almost surely, 2^404240386 is an apocalyptic number.

404240386 is a deficient number, since it is larger than the sum of its proper divisors (259997342).

404240386 is a wasteful number, since it uses less digits than its factorization.

404240386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76497.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 404240386 is about 20105.7301782353. The cubic root of 404240386 is about 739.4007725054.

The spelling of 404240386 in words is "four hundred four million, two hundred forty thousand, three hundred eighty-six".