1828840 has 32 divisors (see below), whose sum is σ = 4432680. Its totient is φ = 675072.

The previous prime is 1828831. The next prime is 1828847. The reversal of 1828840 is 488281.

It can be written as a sum of positive squares in 4 ways, for example, as 1592644 + 236196 = 1262^2 + 486^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1828847) 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, 1239 + ... + 2278.

2^1828840 is an apocalyptic number.

1828840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1828840 is an abundant number, since it is smaller than the sum of its proper divisors (2603840).

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

1828840 is a wasteful number, since it uses less digits than its factorization.

1828840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541 (or 3537 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 1828840 is about 1352.3461095444. The cubic root of 1828840 is about 122.2902700348.

The spelling of 1828840 in words is "one million, eight hundred twenty-eight thousand, eight hundred forty".