404220965 has 16 divisors (see below), whose sum is σ = 489630960. Its totient is φ = 320348160.

The previous prime is 404220961. The next prime is 404220989. The reversal of 404220965 is 569022404.

It can be written as a sum of positive squares in 8 ways, for example, as 293676769 + 110544196 = 17137^2 + 10514^2 .

It is not a de Polignac number, because 404220965 - 2² = 404220961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404220961) 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, 286181 + ... + 287589.

It is an arithmetic number, because the mean of its divisors is an integer number (30601935).

Almost surely, 2^404220965 is an apocalyptic number.

It is an amenable number.

404220965 is a deficient number, since it is larger than the sum of its proper divisors (85409995).

404220965 is a wasteful number, since it uses less digits than its factorization.

404220965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 404220965 is about 20105.2472006688. The cubic root of 404220965 is about 739.3889312570.

The spelling of 404220965 in words is "four hundred four million, two hundred twenty thousand, nine hundred sixty-five".