72415839 has 4 divisors (see below), whose sum is σ = 96554456. Its totient is φ = 48277224.

The previous prime is 72415823. The next prime is 72415841. The reversal of 72415839 is 93851427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93851427 = 3 ⋅31283809.

It is not a de Polignac number, because 72415839 - 2⁴ = 72415823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72415797 and 72415806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72415879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12069304 + ... + 12069309.

It is an arithmetic number, because the mean of its divisors is an integer number (24138614).

Almost surely, 2^72415839 is an apocalyptic number.

72415839 is a deficient number, since it is larger than the sum of its proper divisors (24138617).

72415839 is a wasteful number, since it uses less digits than its factorization.

72415839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24138616.

The product of its digits is 60480, while the sum is 39.

The square root of 72415839 is about 8509.7496437909. The cubic root of 72415839 is about 416.8161350335.

The spelling of 72415839 in words is "seventy-two million, four hundred fifteen thousand, eight hundred thirty-nine".