1828661 has 8 divisors (see below), whose sum is σ = 1953600. Its totient is φ = 1708476.

The previous prime is 1828649. The next prime is 1828663. The reversal of 1828661 is 1668281.

It is not a de Polignac number, because 1828661 - 2¹⁸ = 1566517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1828663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42506 + ... + 42548.

It is an arithmetic number, because the mean of its divisors is an integer number (244200).

2^1828661 is an apocalyptic number.

It is an amenable number.

1828661 is a deficient number, since it is larger than the sum of its proper divisors (124939).

1828661 is an frugal number, since it uses more digits than its factorization.

1828661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 66 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 1828661 is about 1352.2799266424. The cubic root of 1828661 is about 122.2862801336.

The spelling of 1828661 in words is "one million, eight hundred twenty-eight thousand, six hundred sixty-one".