904140 has 36 divisors (see below), whose sum is σ = 2743104. Its totient is φ = 241056.

The previous prime is 904121. The next prime is 904147. The reversal of 904140 is 41409.

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 (904147) by changing a digit.

904140 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2332 + ... + 2691.

2⁹⁰⁴¹⁴⁰ is an apocalyptic number.

904140 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

904140 is an abundant number, since it is smaller than the sum of its proper divisors (1838964).

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

904140 is a wasteful number, since it uses less digits than its factorization.

904140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038 (or 5033 counting only the distinct ones).

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

The square root of 904140 is about 950.8627661235. The cubic root of 904140 is about 96.6967537473.

Adding to 904140 its reverse (41409), we get a palindrome (945549).

The spelling of 904140 in words is "nine hundred four thousand, one hundred forty".