72811858 has 8 divisors (see below), whose sum is σ = 124820352. Its totient is φ = 31205076.

The previous prime is 72811829. The next prime is 72811861. The reversal of 72811858 is 85811827.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72811858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600410 + ... + 2600437.

It is an arithmetic number, because the mean of its divisors is an integer number (15602544).

Almost surely, 2^72811858 is an apocalyptic number.

72811858 is a deficient number, since it is larger than the sum of its proper divisors (52008494).

72811858 is a wasteful number, since it uses less digits than its factorization.

72811858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200856.

The product of its digits is 35840, while the sum is 40.

The square root of 72811858 is about 8532.9864643043. The cubic root of 72811858 is about 417.5745654285.

The spelling of 72811858 in words is "seventy-two million, eight hundred eleven thousand, eight hundred fifty-eight".