1880640 has 84 divisors (see below), whose sum is σ = 6478524. Its totient is φ = 500736.

The previous prime is 1880633. The next prime is 1880647. The reversal of 1880640 is 460881.

1880640 is a `hidden beast` number, since 18 + 8 + 0 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (1880633) and next prime (1880647).

It can be written as a sum of positive squares in 2 ways, for example, as 553536 + 1327104 = 744^2 + 1152^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880647) 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, 2554 + ... + 3206.

2^1880640 is an apocalyptic number.

1880640 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 1880640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3239262).

1880640 is an abundant number, since it is smaller than the sum of its proper divisors (4597884).

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

1880640 is a wasteful number, since it uses less digits than its factorization.

1880640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1880640 is about 1371.3642842075. The cubic root of 1880640 is about 123.4341193861.

The spelling of 1880640 in words is "one million, eight hundred eighty thousand, six hundred forty".