72457329 has 24 divisors (see below), whose sum is σ = 112777920. Its totient is φ = 41258784.

The previous prime is 72457327. The next prime is 72457331. The reversal of 72457329 is 92375427.

It is an interprime number because it is at equal distance from previous prime (72457327) and next prime (72457331).

It is not a de Polignac number, because 72457329 - 2¹ = 72457327 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72457327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52087 + ... + 53459.

It is an arithmetic number, because the mean of its divisors is an integer number (4699080).

Almost surely, 2^72457329 is an apocalyptic number.

It is an amenable number.

72457329 is a deficient number, since it is larger than the sum of its proper divisors (40320591).

72457329 is a wasteful number, since it uses less digits than its factorization.

72457329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1749 (or 1742 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The square root of 72457329 is about 8512.1870867598. The cubic root of 72457329 is about 416.8957235138.

The spelling of 72457329 in words is "seventy-two million, four hundred fifty-seven thousand, three hundred twenty-nine".