281680072 has 32 divisors (see below), whose sum is σ = 564197400. Its totient is φ = 131375104.

The previous prime is 281680051. The next prime is 281680093. The reversal of 281680072 is 270086182.

281680072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (281680051) and next prime (281680093).

It can be written as a sum of positive squares in 4 ways, for example, as 198979236 + 82700836 = 14106^2 + 9094^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6204 + ... + 24532.

Almost surely, 2^281680072 is an apocalyptic number.

It is an amenable number.

281680072 is an abundant number, since it is smaller than the sum of its proper divisors (282517328).

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

281680072 is a wasteful number, since it uses less digits than its factorization.

281680072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18465 (or 18461 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 281680072 is about 16783.3272029118. The cubic root of 281680072 is about 655.5191362491.

The spelling of 281680072 in words is "two hundred eighty-one million, six hundred eighty thousand, seventy-two".