280725417 has 12 divisors (see below), whose sum is σ = 463419840. Its totient is φ = 160414488.

The previous prime is 280725397. The next prime is 280725421. The reversal of 280725417 is 714527082.

It is not a de Polignac number, because 280725417 - 2¹⁰ = 280724393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280725317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2227917 + ... + 2228042.

It is an arithmetic number, because the mean of its divisors is an integer number (38618320).

Almost surely, 2^280725417 is an apocalyptic number.

It is an amenable number.

280725417 is a deficient number, since it is larger than the sum of its proper divisors (182694423).

280725417 is a wasteful number, since it uses less digits than its factorization.

280725417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4455972 (or 4455969 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 280725417 is about 16754.8624882450. The cubic root of 280725417 is about 654.7777479540. Note that the first 4 decimals are identical.

It can be divided in two parts, 28072 and 5417, that added together give a square (33489 = 183²).

The spelling of 280725417 in words is "two hundred eighty million, seven hundred twenty-five thousand, four hundred seventeen".