1674820 has 36 divisors (see below), whose sum is σ = 4093740. Its totient is φ = 573888.

The previous prime is 1674817. The next prime is 1674821. The reversal of 1674820 is 284761.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 1223236 = 672^2 + 1106^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1674821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126 + ... + 1834.

It is an arithmetic number, because the mean of its divisors is an integer number (113715).

2^1674820 is an apocalyptic number.

1674820 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 1674820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2046870).

1674820 is an abundant number, since it is smaller than the sum of its proper divisors (2418920).

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

1674820 is a wasteful number, since it uses less digits than its factorization.

1674820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1674820 is about 1294.1483686193. The cubic root of 1674820 is about 118.7561326473.

The spelling of 1674820 in words is "one million, six hundred seventy-four thousand, eight hundred twenty".