280750080 has 384 divisors, whose sum is σ = 1045699200. Its totient is φ = 63700992.

The previous prime is 280750079. The next prime is 280750081. The reversal of 280750080 is 80057082.

It is an interprime number because it is at equal distance from previous prime (280750079) and next prime (280750081).

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 (30).

It is not an unprimeable number, because it can be changed into a prime (280750081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7587822 + ... + 7587858.

It is an arithmetic number, because the mean of its divisors is an integer number (2723175).

Almost surely, 2^280750080 is an apocalyptic number.

280750080 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 280750080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (522849600).

280750080 is an abundant number, since it is smaller than the sum of its proper divisors (764949120).

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

280750080 is a wasteful number, since it uses less digits than its factorization.

280750080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 280750080 is about 16755.5984673780. The cubic root of 280750080 is about 654.7969224566.

The spelling of 280750080 in words is "two hundred eighty million, seven hundred fifty thousand, eighty".