72531782 has 8 divisors (see below), whose sum is σ = 108936576. Its totient is φ = 36219592.

The previous prime is 72531779. The next prime is 72531787. The reversal of 72531782 is 28713527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72531787) 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, 21158 + ... + 24345.

It is an arithmetic number, because the mean of its divisors is an integer number (13617072).

Almost surely, 2^72531782 is an apocalyptic number.

72531782 is a deficient number, since it is larger than the sum of its proper divisors (36404794).

72531782 is a wasteful number, since it uses less digits than its factorization.

72531782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46302.

The product of its digits is 23520, while the sum is 35.

The square root of 72531782 is about 8516.5592817757. The cubic root of 72531782 is about 417.0384673533.

The spelling of 72531782 in words is "seventy-two million, five hundred thirty-one thousand, seven hundred eighty-two".