280720071 has 12 divisors (see below), whose sum is σ = 415374960. Its totient is φ = 182581920.

The previous prime is 280720057. The next prime is 280720103. The reversal of 280720071 is 170027082.

It is not a de Polignac number, because 280720071 - 2⁹ = 280719559 is a prime.

It is a super-3 number, since 3×280720071³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280720001) 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, 380011 + ... + 380748.

It is an arithmetic number, because the mean of its divisors is an integer number (34614580).

Almost surely, 2^280720071 is an apocalyptic number.

280720071 is a deficient number, since it is larger than the sum of its proper divisors (134654889).

280720071 is a wasteful number, since it uses less digits than its factorization.

280720071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760806 (or 760803 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 280720071 is about 16754.7029517088. The cubic root of 280720071 is about 654.7735915033.

The spelling of 280720071 in words is "two hundred eighty million, seven hundred twenty thousand, seventy-one".