40280 has 32 divisors (see below), whose sum is σ = 97200. Its totient is φ = 14976.

The previous prime is 40277. The next prime is 40283. The reversal of 40280 is 8204.

40280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40277) and next prime (40283).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734 + ... + 786.

2⁴⁰²⁸⁰ is an apocalyptic number.

40280 is a gapful number since it is divisible by the number (40) 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 40280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48600).

40280 is an abundant number, since it is smaller than the sum of its proper divisors (56920).

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

40280 is a wasteful number, since it uses less digits than its factorization.

40280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 40280 is about 200.6987792688. The cubic root of 40280 is about 34.2791323344.

Adding to 40280 its reverse (8204), we get a palindrome (48484).

The spelling of 40280 in words is "forty thousand, two hundred eighty".