72419881 has 8 divisors (see below), whose sum is σ = 77068800. Its totient is φ = 67814208.

The previous prime is 72419863. The next prime is 72419917. The reversal of 72419881 is 18891427.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72419881 - 2¹¹ = 72417833 is a prime.

It is a super-2 number, since 2×72419881² = 10489278328108322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72419381) 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, 7321 + ... + 14086.

It is an arithmetic number, because the mean of its divisors is an integer number (9633600).

Almost surely, 2^72419881 is an apocalyptic number.

It is an amenable number.

72419881 is a deficient number, since it is larger than the sum of its proper divisors (4648919).

72419881 is a wasteful number, since it uses less digits than its factorization.

72419881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21623.

The product of its digits is 32256, while the sum is 40.

The square root of 72419881 is about 8509.9871327752. The cubic root of 72419881 is about 416.8238899643.

The spelling of 72419881 in words is "seventy-two million, four hundred nineteen thousand, eight hundred eighty-one".