72304537 has 8 divisors (see below), whose sum is σ = 73352160. Its totient is φ = 71261280.

The previous prime is 72304523. The next prime is 72304567. The reversal of 72304537 is 73540327.

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

It is a cyclic number.

It is not a de Polignac number, because 72304537 - 2⁷ = 72304409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72304499 and 72304508.

It is not an unprimeable number, because it can be changed into a prime (72304567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46462 + ... + 47992.

It is an arithmetic number, because the mean of its divisors is an integer number (9169020).

Almost surely, 2^72304537 is an apocalyptic number.

It is an amenable number.

72304537 is a deficient number, since it is larger than the sum of its proper divisors (1047623).

72304537 is a wasteful number, since it uses less digits than its factorization.

72304537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 72304537 is about 8503.2074536612. The cubic root of 72304537 is about 416.6024789301.

The spelling of 72304537 in words is "seventy-two million, three hundred four thousand, five hundred thirty-seven".