72340855 has 4 divisors (see below), whose sum is σ = 86809032. Its totient is φ = 57872680.

The previous prime is 72340843. The next prime is 72340859. The reversal of 72340855 is 55804327.

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: 55804327 = 5281 ⋅10567.

It is not a de Polignac number, because 72340855 - 2¹¹ = 72338807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72340855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72340859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7234081 + ... + 7234090.

It is an arithmetic number, because the mean of its divisors is an integer number (21702258).

Almost surely, 2^72340855 is an apocalyptic number.

72340855 is a deficient number, since it is larger than the sum of its proper divisors (14468177).

72340855 is a wasteful number, since it uses less digits than its factorization.

72340855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14468176.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 72340855 is about 8505.3427326593. The cubic root of 72340855 is about 416.6722193038.

The spelling of 72340855 in words is "seventy-two million, three hundred forty thousand, eight hundred fifty-five".