280528248 has 128 divisors (see below), whose sum is σ = 941713920. Its totient is φ = 67253760.

The previous prime is 280528231. The next prime is 280528277. The reversal of 280528248 is 842825082.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18186 + ... + 29862.

It is an arithmetic number, because the mean of its divisors is an integer number (7357140).

Almost surely, 2^280528248 is an apocalyptic number.

280528248 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 280528248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (470856960).

280528248 is an abundant number, since it is smaller than the sum of its proper divisors (661185672).

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

280528248 is a wasteful number, since it uses less digits than its factorization.

280528248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11717 (or 11713 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 39.

The square root of 280528248 is about 16748.9775210309. The cubic root of 280528248 is about 654.6244164981.

The spelling of 280528248 in words is "two hundred eighty million, five hundred twenty-eight thousand, two hundred forty-eight".