404009694 has 80 divisors (see below), whose sum is σ = 993586176. Its totient is φ = 121683600.

The previous prime is 404009693. The next prime is 404009707. The reversal of 404009694 is 496900404.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404009693) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 339769 + ... + 340955.

Almost surely, 2^404009694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404009694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496793088).

404009694 is an abundant number, since it is smaller than the sum of its proper divisors (589576482).

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

404009694 is a wasteful number, since it uses less digits than its factorization.

404009694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1394 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 404009694 is about 20099.9923880583. The cubic root of 404009694 is about 739.2600919376.

The spelling of 404009694 in words is "four hundred four million, nine thousand, six hundred ninety-four".