280421076 has 96 divisors (see below), whose sum is σ = 762079360. Its totient is φ = 79501824.

The previous prime is 280421051. The next prime is 280421077. The reversal of 280421076 is 670124082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280421077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108390 + ... + 110946.

Almost surely, 2^280421076 is an apocalyptic number.

280421076 is a gapful number since it is divisible by the number (26) 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 280421076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381039680).

280421076 is an abundant number, since it is smaller than the sum of its proper divisors (481658284).

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

280421076 is a wasteful number, since it uses less digits than its factorization.

280421076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2633 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 280421076 is about 16745.7778559254. Note that the first 3 decimals coincide. The cubic root of 280421076 is about 654.5410424296.

The spelling of 280421076 in words is "two hundred eighty million, four hundred twenty-one thousand, seventy-six".