72581870 has 8 divisors (see below), whose sum is σ = 130647384. Its totient is φ = 29032744.

The previous prime is 72581863. The next prime is 72581909. The reversal of 72581870 is 7818527.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3629084 + ... + 3629103.

It is an arithmetic number, because the mean of its divisors is an integer number (16330923).

Almost surely, 2^72581870 is an apocalyptic number.

72581870 is a deficient number, since it is larger than the sum of its proper divisors (58065514).

72581870 is a wasteful number, since it uses less digits than its factorization.

72581870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7258194.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 72581870 is about 8519.4993984389. The cubic root of 72581870 is about 417.1344428264.

The spelling of 72581870 in words is "seventy-two million, five hundred eighty-one thousand, eight hundred seventy".