404387090 has 8 divisors (see below), whose sum is σ = 727896780. Its totient is φ = 161754832.

The previous prime is 404387069. The next prime is 404387099. The reversal of 404387090 is 90783404.

It can be written as a sum of positive squares in 2 ways, for example, as 401321089 + 3066001 = 20033^2 + 1751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 404387090.

It is not an unprimeable number, because it can be changed into a prime (404387099) 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, 20219345 + ... + 20219364.

Almost surely, 2^404387090 is an apocalyptic number.

404387090 is a deficient number, since it is larger than the sum of its proper divisors (323509690).

404387090 is a wasteful number, since it uses less digits than its factorization.

404387090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40438716.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 404387090 is about 20109.3781604504. The cubic root of 404387090 is about 739.4902076824.

The spelling of 404387090 in words is "four hundred four million, three hundred eighty-seven thousand, ninety".