72408365 has 4 divisors (see below), whose sum is σ = 86890044. Its totient is φ = 57926688.

The previous prime is 72408311. The next prime is 72408377. The reversal of 72408365 is 56380427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56380427 = 157 ⋅359111.

It can be written as a sum of positive squares in 2 ways, for example, as 44328964 + 28079401 = 6658^2 + 5299^2 .

It is a cyclic number.

It is not a de Polignac number, because 72408365 - 2⁸ = 72408109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7240832 + ... + 7240841.

It is an arithmetic number, because the mean of its divisors is an integer number (21722511).

Almost surely, 2^72408365 is an apocalyptic number.

It is an amenable number.

72408365 is a deficient number, since it is larger than the sum of its proper divisors (14481679).

72408365 is a wasteful number, since it uses less digits than its factorization.

72408365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14481678.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 72408365 is about 8509.3104891054. The cubic root of 72408365 is about 416.8017947500.

The spelling of 72408365 in words is "seventy-two million, four hundred eight thousand, three hundred sixty-five".