72397841 has 8 divisors (see below), whose sum is σ = 75565224. Its totient is φ = 69297280.

The previous prime is 72397811. The next prime is 72397861. The reversal of 72397841 is 14879327.

It can be written as a sum of positive squares in 4 ways, for example, as 1164241 + 71233600 = 1079^2 + 8440^2 .

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 72397841 - 2²² = 68203537 is a prime.

It is a super-2 number, since 2×72397841² = 10482894762922562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72397811) 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, 14486 + ... + 18831.

It is an arithmetic number, because the mean of its divisors is an integer number (9445653).

Almost surely, 2^72397841 is an apocalyptic number.

It is an amenable number.

72397841 is a deficient number, since it is larger than the sum of its proper divisors (3167383).

72397841 is a wasteful number, since it uses less digits than its factorization.

72397841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33411.

The product of its digits is 84672, while the sum is 41.

The square root of 72397841 is about 8508.6920851562. The cubic root of 72397841 is about 416.7816007912.

The spelling of 72397841 in words is "seventy-two million, three hundred ninety-seven thousand, eight hundred forty-one".