1880020 has 48 divisors (see below), whose sum is σ = 4249728. Its totient is φ = 696960.

The previous prime is 1880017. The next prime is 1880023. The reversal of 1880020 is 200881.

1880020 = 347² + 348² + ... + 361².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1880017) and next prime (1880023).

It is a self number, because there is not a number n which added to its sum of digits gives 1880020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28027 + ... + 28093.

It is an arithmetic number, because the mean of its divisors is an integer number (88536).

2^1880020 is an apocalyptic number.

1880020 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 1880020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2124864).

1880020 is an abundant number, since it is smaller than the sum of its proper divisors (2369708).

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

1880020 is a wasteful number, since it uses less digits than its factorization.

1880020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1880020 is about 1371.1382133104. The cubic root of 1880020 is about 123.4205535140.

The spelling of 1880020 in words is "one million, eight hundred eighty thousand, twenty".