1671880 has 48 divisors (see below), whose sum is σ = 4381020. Its totient is φ = 572544.

The previous prime is 1671781. The next prime is 1671907. The reversal of 1671880 is 881761.

It can be written as a sum of positive squares in 2 ways, for example, as 1483524 + 188356 = 1218^2 + 434^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1534 + ... + 2386.

2^1671880 is an apocalyptic number.

1671880 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 1671880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2190510).

1671880 is an abundant number, since it is smaller than the sum of its proper divisors (2709140).

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

1671880 is a wasteful number, since it uses less digits than its factorization.

1671880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1671880 is about 1293.0119875701. The cubic root of 1671880 is about 118.6866032797.

Subtracting from 1671880 its sum of digits (31), we obtain a square (1671849 = 1293²).

The spelling of 1671880 in words is "one million, six hundred seventy-one thousand, eight hundred eighty".