280373340 has 96 divisors (see below), whose sum is σ = 853183296. Its totient is φ = 68382720.

The previous prime is 280373323. The next prime is 280373347. The reversal of 280373340 is 43373082.

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

It is a junction number, because it is equal to n+sod(n) for n = 280373298 and 280373307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280373347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86550 + ... + 89730.

It is an arithmetic number, because the mean of its divisors is an integer number (8887326).

Almost surely, 2^280373340 is an apocalyptic number.

280373340 is a gapful number since it is divisible by the number (20) 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 280373340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426591648).

280373340 is an abundant number, since it is smaller than the sum of its proper divisors (572809956).

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

280373340 is a wasteful number, since it uses less digits than its factorization.

280373340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3319 (or 3317 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 280373340 is about 16744.3524807620. The cubic root of 280373340 is about 654.5038995434.

The spelling of 280373340 in words is "two hundred eighty million, three hundred seventy-three thousand, three hundred forty".