1674640 has 60 divisors (see below), whose sum is σ = 4304412. Its totient is φ = 605440.

The previous prime is 1674637. The next prime is 1674643. The reversal of 1674640 is 464761.

It is an interprime number because it is at equal distance from previous prime (1674637) and next prime (1674643).

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 559504 = 1056^2 + 748^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1674599 and 1674608.

It is not an unprimeable number, because it can be changed into a prime (1674643) 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, 9594 + ... + 9766.

2^1674640 is an apocalyptic number.

1674640 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 1674640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2152206).

1674640 is an abundant number, since it is smaller than the sum of its proper divisors (2629772).

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

1674640 is a wasteful number, since it uses less digits than its factorization.

1674640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1674640 is about 1294.0788229470. The cubic root of 1674640 is about 118.7518780866.

The spelling of 1674640 in words is "one million, six hundred seventy-four thousand, six hundred forty".