280428426 has 32 divisors (see below), whose sum is σ = 624672000. Its totient is φ = 93251520.

The previous prime is 280428373. The next prime is 280428427. The reversal of 280428426 is 624824082.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (280428427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17250 + ... + 29298.

It is an arithmetic number, because the mean of its divisors is an integer number (19521000).

Almost surely, 2^280428426 is an apocalyptic number.

280428426 is an abundant number, since it is smaller than the sum of its proper divisors (344243574).

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

280428426 is a wasteful number, since it uses less digits than its factorization.

280428426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12491 (or 12485 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 280428426 is about 16745.9973127909. The cubic root of 280428426 is about 654.5467610138.

The spelling of 280428426 in words is "two hundred eighty million, four hundred twenty-eight thousand, four hundred twenty-six".