72284140 has 12 divisors (see below), whose sum is σ = 151796736. Its totient is φ = 28913648.

The previous prime is 72284129. The next prime is 72284197. The reversal of 72284140 is 4148227.

It is a junction number, because it is equal to n+sod(n) for n = 72284099 and 72284108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1807084 + ... + 1807123.

It is an arithmetic number, because the mean of its divisors is an integer number (12649728).

Almost surely, 2^72284140 is an apocalyptic number.

It is an amenable number.

72284140 is an abundant number, since it is smaller than the sum of its proper divisors (79512596).

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

72284140 is a wasteful number, since it uses less digits than its factorization.

72284140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614216 (or 3614214 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 72284140 is about 8502.0079981143. The cubic root of 72284140 is about 416.5633009372.

The spelling of 72284140 in words is "seventy-two million, two hundred eighty-four thousand, one hundred forty".