1090404 has 36 divisors (see below), whose sum is σ = 3150784. Its totient is φ = 311472.

The previous prime is 1090403. The next prime is 1090409. The reversal of 1090404 is 4040901.

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 not an unprimeable number, because it can be changed into a prime (1090403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1912 + ... + 2415.

2^1090404 is an apocalyptic number.

1090404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1090404 is an abundant number, since it is smaller than the sum of its proper divisors (2060380).

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

1090404 is a wasteful number, since it uses less digits than its factorization.

1090404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344 (or 4339 counting only the distinct ones).

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

The square root of 1090404 is about 1044.2241138759. The cubic root of 1090404 is about 102.9269598743.

The spelling of 1090404 in words is "one million, ninety thousand, four hundred four".