1563780 has 48 divisors (see below), whose sum is σ = 4455360. Its totient is φ = 409728.

The previous prime is 1563773. The next prime is 1563791. The reversal of 1563780 is 873651.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3826 + ... + 4214.

It is an arithmetic number, because the mean of its divisors is an integer number (92820).

2^1563780 is an apocalyptic number.

1563780 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 1563780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2227680).

1563780 is an abundant number, since it is smaller than the sum of its proper divisors (2891580).

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

1563780 is a wasteful number, since it uses less digits than its factorization.

1563780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1563780 is about 1250.5118951853. The cubic root of 1563780 is about 116.0713987715.

The spelling of 1563780 in words is "one million, five hundred sixty-three thousand, seven hundred eighty".