404049990 has 64 divisors (see below), whose sum is σ = 1003575744. Its totient is φ = 104030208.

The previous prime is 404049979. The next prime is 404050013. The reversal of 404049990 is 99940404.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150742 + ... + 153398.

It is an arithmetic number, because the mean of its divisors is an integer number (15680871).

Almost surely, 2^404049990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404049990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501787872).

404049990 is an abundant number, since it is smaller than the sum of its proper divisors (599525754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404049990 is a wasteful number, since it uses less digits than its factorization.

404049990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2841.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 404049990 is about 20100.9947515042. The cubic root of 404049990 is about 739.2846690990.

The spelling of 404049990 in words is "four hundred four million, forty-nine thousand, nine hundred ninety".