72035991 has 12 divisors (see below), whose sum is σ = 105816360. Its totient is φ = 47209680.

The previous prime is 72035959. The next prime is 72035993. The reversal of 72035991 is 19953027.

It is not a de Polignac number, because 72035991 - 2⁵ = 72035959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72035993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67300 + ... + 68361.

It is an arithmetic number, because the mean of its divisors is an integer number (8818030).

Almost surely, 2^72035991 is an apocalyptic number.

72035991 is a deficient number, since it is larger than the sum of its proper divisors (33780369).

72035991 is a wasteful number, since it uses less digits than its factorization.

72035991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135726 (or 135723 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 72035991 is about 8487.4018992858. The cubic root of 72035991 is about 416.0860718567.

The spelling of 72035991 in words is "seventy-two million, thirty-five thousand, nine hundred ninety-one".