72814881 has 8 divisors (see below), whose sum is σ = 97170304. Its totient is φ = 48501360.

The previous prime is 72814879. The next prime is 72814883. The reversal of 72814881 is 18841827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72814879) and next prime (72814883).

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

It is not a de Polignac number, because 72814881 - 2¹ = 72814879 is a prime.

It is a super-2 number, since 2×72814881² = 10604013790088322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72814883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6166 + ... + 13551.

It is an arithmetic number, because the mean of its divisors is an integer number (12146288).

Almost surely, 2^72814881 is an apocalyptic number.

It is an amenable number.

72814881 is a deficient number, since it is larger than the sum of its proper divisors (24355423).

72814881 is a wasteful number, since it uses less digits than its factorization.

72814881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20951.

The product of its digits is 28672, while the sum is 39.

The square root of 72814881 is about 8533.1635985723. The cubic root of 72814881 is about 417.5803442970.

The spelling of 72814881 in words is "seventy-two million, eight hundred fourteen thousand, eight hundred eighty-one".