72145758 has 32 divisors (see below), whose sum is σ = 146837376. Its totient is φ = 23627808.

The previous prime is 72145757. The next prime is 72145781. The reversal of 72145758 is 85754127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72145757) 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, 137685 + ... + 138207.

It is an arithmetic number, because the mean of its divisors is an integer number (4588668).

Almost surely, 2^72145758 is an apocalyptic number.

72145758 is an abundant number, since it is smaller than the sum of its proper divisors (74691618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72145758 is a wasteful number, since it uses less digits than its factorization.

72145758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888.

The product of its digits is 78400, while the sum is 39.

The square root of 72145758 is about 8493.8659042865. The cubic root of 72145758 is about 416.2973058087.

The spelling of 72145758 in words is "seventy-two million, one hundred forty-five thousand, seven hundred fifty-eight".