72072855 has 64 divisors (see below), whose sum is σ = 134830080. Its totient is φ = 36484992.

The previous prime is 72072841. The next prime is 72072857. The reversal of 72072855 is 55827027.

It is not a de Polignac number, because 72072855 - 2¹¹ = 72070807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72072857) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 234612 + ... + 234918.

It is an arithmetic number, because the mean of its divisors is an integer number (2106720).

Almost surely, 2^72072855 is an apocalyptic number.

72072855 is a deficient number, since it is larger than the sum of its proper divisors (62757225).

72072855 is a wasteful number, since it uses less digits than its factorization.

72072855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 72072855 is about 8489.5733108325. The cubic root of 72072855 is about 416.1570362964.

It can be divided in two parts, 72072 and 855, that added together give a palindrome (72927).

The spelling of 72072855 in words is "seventy-two million, seventy-two thousand, eight hundred fifty-five".