72942881 has 16 divisors (see below), whose sum is σ = 84062400. Its totient is φ = 62596800.

The previous prime is 72942829. The next prime is 72942889. The reversal of 72942881 is 18824927.

It is a cyclic number.

It is not a de Polignac number, because 72942881 - 2⁶ = 72942817 is a prime.

It is a super-2 number, since 2×72942881² = 10641327777160322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72942889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87575 + ... + 88403.

It is an arithmetic number, because the mean of its divisors is an integer number (5253900).

Almost surely, 2^72942881 is an apocalyptic number.

It is an amenable number.

72942881 is a deficient number, since it is larger than the sum of its proper divisors (11119519).

72942881 is a wasteful number, since it uses less digits than its factorization.

72942881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280.

The product of its digits is 64512, while the sum is 41.

The square root of 72942881 is about 8540.6604545550. The cubic root of 72942881 is about 417.8248867775.

The spelling of 72942881 in words is "seventy-two million, nine hundred forty-two thousand, eight hundred eighty-one".