72397855 has 8 divisors (see below), whose sum is σ = 88174512. Its totient is φ = 57053568.

The previous prime is 72397811. The next prime is 72397861. The reversal of 72397855 is 55879327.

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 72397855 - 2⁷ = 72397727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107722 + ... + 108391.

It is an arithmetic number, because the mean of its divisors is an integer number (11021814).

Almost surely, 2^72397855 is an apocalyptic number.

72397855 is a deficient number, since it is larger than the sum of its proper divisors (15776657).

72397855 is a wasteful number, since it uses less digits than its factorization.

72397855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216185.

The product of its digits is 529200, while the sum is 46.

The square root of 72397855 is about 8508.6929078443. The cubic root of 72397855 is about 416.7816276564.

The spelling of 72397855 in words is "seventy-two million, three hundred ninety-seven thousand, eight hundred fifty-five".