1813630 has 32 divisors (see below), whose sum is σ = 4019904. Its totient is φ = 573696.

The previous prime is 1813627. The next prime is 1813639. The reversal of 1813630 is 363181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87 + ... + 1906.

It is an arithmetic number, because the mean of its divisors is an integer number (125622).

2^1813630 is an apocalyptic number.

1813630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1813630 is an abundant number, since it is smaller than the sum of its proper divisors (2206274).

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

1813630 is a wasteful number, since it uses less digits than its factorization.

1813630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1813630 is about 1346.7108078574. The cubic root of 1813630 is about 121.9503067346.

The spelling of 1813630 in words is "one million, eight hundred thirteen thousand, six hundred thirty".