280616325 has 96 divisors (see below), whose sum is σ = 539429760. Its totient is φ = 127411200.

The previous prime is 280616317. The next prime is 280616327. The reversal of 280616325 is 523616082.

It is not a de Polignac number, because 280616325 - 2³ = 280616317 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280616327) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 885067 + ... + 885383.

It is an arithmetic number, because the mean of its divisors is an integer number (5619060).

Almost surely, 2^280616325 is an apocalyptic number.

280616325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

280616325 is a deficient number, since it is larger than the sum of its proper divisors (258813435).

280616325 is a wasteful number, since it uses less digits than its factorization.

280616325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 280616325 is about 16751.6066393645. The cubic root of 280616325 is about 654.6929197855.

It can be divided in two parts, 280 and 616325, that added together give a triangular number (616605 = T₁₁₁₀).

The spelling of 280616325 in words is "two hundred eighty million, six hundred sixteen thousand, three hundred twenty-five".