72740085 has 16 divisors (see below), whose sum is σ = 126964800. Its totient is φ = 35267840.

The previous prime is 72740077. The next prime is 72740089. The reversal of 72740085 is 58004727.

It is not a de Polignac number, because 72740085 - 2³ = 72740077 is a prime.

It is a super-2 number, since 2×72740085² = 10582239931614450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72740089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220260 + ... + 220589.

It is an arithmetic number, because the mean of its divisors is an integer number (7935300).

Almost surely, 2^72740085 is an apocalyptic number.

It is an amenable number.

72740085 is a deficient number, since it is larger than the sum of its proper divisors (54224715).

72740085 is a wasteful number, since it uses less digits than its factorization.

72740085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440868.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 72740085 is about 8528.7798072174. The cubic root of 72740085 is about 417.4373147427.

The spelling of 72740085 in words is "seventy-two million, seven hundred forty thousand, eighty-five".