1009404 has 36 divisors (see below), whose sum is σ = 2784600. Its totient is φ = 305760.

The previous prime is 1009399. The next prime is 1009417. The reversal of 1009404 is 4049001.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 879 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (77350).

2^1009404 is an apocalyptic number.

It is an amenable number.

1009404 is an abundant number, since it is smaller than the sum of its proper divisors (1775196).

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

1009404 is a wasteful number, since it uses less digits than its factorization.

1009404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570 (or 2565 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1009404 is about 1004.6909972723. The cubic root of 1009404 is about 100.3124891548.

The spelling of 1009404 in words is "one million, nine thousand, four hundred four".