280723427 has 8 divisors (see below), whose sum is σ = 283153920. Its totient is φ = 278299080.

The previous prime is 280723411. The next prime is 280723447. The reversal of 280723427 is 724327082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 280723427 - 2⁴ = 280723411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280723447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152402 + ... + 154232.

It is an arithmetic number, because the mean of its divisors is an integer number (35394240).

Almost surely, 2^280723427 is an apocalyptic number.

280723427 is a deficient number, since it is larger than the sum of its proper divisors (2430493).

280723427 is a wasteful number, since it uses less digits than its factorization.

280723427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073.

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 280723427 is about 16754.8031023943. The cubic root of 280723427 is about 654.7762007591.

The spelling of 280723427 in words is "two hundred eighty million, seven hundred twenty-three thousand, four hundred twenty-seven".