280828071504 has 120 divisors (see below), whose sum is σ = 831581279360. Its totient is φ = 88222887936.

The previous prime is 280828071499. The next prime is 280828071509. The reversal of 280828071504 is 405170828082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (280828071499) and next prime (280828071509).

It is a self number, because there is not a number n which added to its sum of digits gives 280828071504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280828071509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262137 + ... + 793959.

Almost surely, 2^280828071504 is an apocalyptic number.

280828071504 is a gapful number since it is divisible by the number (24) 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 280828071504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (415790639680).

280828071504 is an abundant number, since it is smaller than the sum of its proper divisors (550753207856).

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

280828071504 is a wasteful number, since it uses less digits than its factorization.

280828071504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532049 (or 532040 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 45.

Adding to 280828071504 its reverse (405170828082), we get a palindrome (685998899586).

The spelling of 280828071504 in words is "two hundred eighty billion, eight hundred twenty-eight million, seventy-one thousand, five hundred four".