280305088 has 84 divisors (see below), whose sum is σ = 654456400. Its totient is φ = 119067648.

The previous prime is 280305083. The next prime is 280305101. The reversal of 280305088 is 880503082.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280305083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2480520 + ... + 2480632.

Almost surely, 2^280305088 is an apocalyptic number.

280305088 is a gapful number since it is divisible by the number (28) 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 280305088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327228200).

280305088 is an abundant number, since it is smaller than the sum of its proper divisors (374151312).

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

280305088 is an frugal number, since it uses more digits than its factorization.

280305088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 280305088 is about 16742.3142964167. The cubic root of 280305088 is about 654.4507860466.

The spelling of 280305088 in words is "two hundred eighty million, three hundred five thousand, eighty-eight".