72855037 has 4 divisors (see below), whose sum is σ = 73576476. Its totient is φ = 72133600.

The previous prime is 72855031. The next prime is 72855049. The reversal of 72855037 is 73055827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52838361 + 20016676 = 7269^2 + 4474^2 .

It is a cyclic number.

It is not a de Polignac number, because 72855037 - 2¹⁹ = 72330749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72854987 and 72855005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72855031) 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, 360568 + ... + 360769.

It is an arithmetic number, because the mean of its divisors is an integer number (18394119).

Almost surely, 2^72855037 is an apocalyptic number.

It is an amenable number.

72855037 is a deficient number, since it is larger than the sum of its proper divisors (721439).

72855037 is a wasteful number, since it uses less digits than its factorization.

72855037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721438.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 72855037 is about 8535.5162116887. The cubic root of 72855037 is about 417.6570926875.

The spelling of 72855037 in words is "seventy-two million, eight hundred fifty-five thousand, thirty-seven".