280473492 has 96 divisors (see below), whose sum is σ = 740597760. Its totient is φ = 82016640.

The previous prime is 280473491. The next prime is 280473503. The reversal of 280473492 is 294374082.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 280473492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280473491) 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, 284833 + ... + 285815.

It is an arithmetic number, because the mean of its divisors is an integer number (7714560).

Almost surely, 2^280473492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280473492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370298880).

280473492 is an abundant number, since it is smaller than the sum of its proper divisors (460124268).

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

280473492 is a wasteful number, since it uses less digits than its factorization.

280473492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1091 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 280473492 is about 16747.3428340140. The cubic root of 280473492 is about 654.5818219201.

The spelling of 280473492 in words is "two hundred eighty million, four hundred seventy-three thousand, four hundred ninety-two".