280452480 has 384 divisors, whose sum is σ = 1138613760. Its totient is φ = 58060800.

The previous prime is 280452463. The next prime is 280452481. The reversal of 280452480 is 84254082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280452481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1034745 + ... + 1035015.

It is an arithmetic number, because the mean of its divisors is an integer number (2965140).

Almost surely, 2^280452480 is an apocalyptic number.

280452480 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 280452480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569306880).

280452480 is an abundant number, since it is smaller than the sum of its proper divisors (858161280).

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

280452480 is a wasteful number, since it uses less digits than its factorization.

280452480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 280452480 is about 16746.7154988672. The cubic root of 280452480 is about 654.5654752574.

The spelling of 280452480 in words is "two hundred eighty million, four hundred fifty-two thousand, four hundred eighty".