280072764 has 36 divisors (see below), whose sum is σ = 719966520. Its totient is φ = 91774560.

The previous prime is 280072753. The next prime is 280072769. The reversal of 280072764 is 467270082.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280072769) 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, 63807 + ... + 68054.

It is an arithmetic number, because the mean of its divisors is an integer number (19999070).

Almost surely, 2^280072764 is an apocalyptic number.

It is an amenable number.

280072764 is an abundant number, since it is smaller than the sum of its proper divisors (439893756).

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

280072764 is a wasteful number, since it uses less digits than its factorization.

280072764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131930 (or 131925 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 280072764 is about 16735.3746298074. The cubic root of 280072764 is about 654.2699275744.

The spelling of 280072764 in words is "two hundred eighty million, seventy-two thousand, seven hundred sixty-four".