280080438 has 32 divisors (see below), whose sum is σ = 618831360. Its totient is φ = 83796960.

The previous prime is 280080431. The next prime is 280080439. The reversal of 280080438 is 834080082.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 280080399 and 280080408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280080431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21645 + ... + 32072.

It is an arithmetic number, because the mean of its divisors is an integer number (19338480).

Almost surely, 2^280080438 is an apocalyptic number.

280080438 is an abundant number, since it is smaller than the sum of its proper divisors (338750922).

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

280080438 is a wasteful number, since it uses less digits than its factorization.

280080438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53812.

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 280080438 is about 16735.6039030565. The cubic root of 280080438 is about 654.2759031901.

It can be divided in two parts, 2800 and 80438, that added together give a palindrome (83238).

The spelling of 280080438 in words is "two hundred eighty million, eighty thousand, four hundred thirty-eight".