72040285 has 4 divisors (see below), whose sum is σ = 86448348. Its totient is φ = 57632224.

The previous prime is 72040279. The next prime is 72040291. The reversal of 72040285 is 58204027.

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

It is an interprime number because it is at equal distance from previous prime (72040279) and next prime (72040291).

It can be written as a sum of positive squares in 2 ways, for example, as 52838361 + 19201924 = 7269^2 + 4382^2 .

It is a cyclic number.

It is not a de Polignac number, because 72040285 - 2¹¹ = 72038237 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 3 ways as a sum of consecutive naturals, for example, 7204024 + ... + 7204033.

It is an arithmetic number, because the mean of its divisors is an integer number (21612087).

Almost surely, 2^72040285 is an apocalyptic number.

It is an amenable number.

72040285 is a deficient number, since it is larger than the sum of its proper divisors (14408063).

72040285 is a wasteful number, since it uses less digits than its factorization.

72040285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14408062.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 72040285 is about 8487.6548586756. The cubic root of 72040285 is about 416.0943391968.

The spelling of 72040285 in words is "seventy-two million, forty thousand, two hundred eighty-five".