1813040 has 40 divisors (see below), whose sum is σ = 4272048. Its totient is φ = 715520.

The previous prime is 1813039. The next prime is 1813073. The reversal of 1813040 is 403181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1813040² = 6574228083200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10394 + ... + 10566.

2^1813040 is an apocalyptic number.

1813040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1813040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2136024).

1813040 is an abundant number, since it is smaller than the sum of its proper divisors (2459008).

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

1813040 is a wasteful number, since it uses less digits than its factorization.

1813040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1813040 is about 1346.4917378135. The cubic root of 1813040 is about 121.9370812358.

The spelling of 1813040 in words is "one million, eight hundred thirteen thousand, forty".