280726425 has 192 divisors, whose sum is σ = 642816000. Its totient is φ = 117262080.

The previous prime is 280726393. The next prime is 280726429. The reversal of 280726425 is 524627082.

280726425 is a `hidden beast` number, since 2 + 8 + 0 + 7 + 2 + 642 + 5 = 666.

It is not a de Polignac number, because 280726425 - 2⁵ = 280726393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280726425.

It is not an unprimeable number, because it can be changed into a prime (280726429) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4758046 + ... + 4758104.

It is an arithmetic number, because the mean of its divisors is an integer number (3348000).

Almost surely, 2^280726425 is an apocalyptic number.

280726425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280726425 is an abundant number, since it is smaller than the sum of its proper divisors (362089575).

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

280726425 is a wasteful number, since it uses less digits than its factorization.

280726425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 280726425 is about 16754.8925690379. The cubic root of 280726425 is about 654.7785316560.

The spelling of 280726425 in words is "two hundred eighty million, seven hundred twenty-six thousand, four hundred twenty-five".