40780 has 12 divisors (see below), whose sum is σ = 85680. Its totient is φ = 16304.

The previous prime is 40771. The next prime is 40787. The reversal of 40780 is 8704.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (7140).

2⁴⁰⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

40780 is an abundant number, since it is smaller than the sum of its proper divisors (44900).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42840).

40780 is a wasteful number, since it uses less digits than its factorization.

40780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 40780 is about 201.9405853215. The cubic root of 40780 is about 34.4203863297.

It can be divided in two parts, 40 and 780, that added together give a triangular number (820 = T₄₀).

The spelling of 40780 in words is "forty thousand, seven hundred eighty".