1830990 has 32 divisors (see below), whose sum is σ = 5022720. Its totient is φ = 418464.

The previous prime is 1830977. The next prime is 1831001. The reversal of 1830990 is 990381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4150 + ... + 4569.

It is an arithmetic number, because the mean of its divisors is an integer number (156960).

2^1830990 is an apocalyptic number.

1830990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1830990 is an abundant number, since it is smaller than the sum of its proper divisors (3191730).

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

1830990 is a wasteful number, since it uses less digits than its factorization.

1830990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8736.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1830990 is about 1353.1407909009. The cubic root of 1830990 is about 122.3381730983.

The spelling of 1830990 in words is "one million, eight hundred thirty thousand, nine hundred ninety".