72304623 has 32 divisors (see below), whose sum is σ = 110953920. Its totient is φ = 46500480.

The previous prime is 72304577. The next prime is 72304643. The reversal of 72304623 is 32640327.

72304623 is a `hidden beast` number, since 7 + 2 + 30 + 4 + 623 = 666.

It is not a de Polignac number, because 72304623 - 2¹⁰ = 72303599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72304643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156613 + ... + 157073.

It is an arithmetic number, because the mean of its divisors is an integer number (3467310).

Almost surely, 2^72304623 is an apocalyptic number.

72304623 is a deficient number, since it is larger than the sum of its proper divisors (38649297).

72304623 is a wasteful number, since it uses less digits than its factorization.

72304623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 72304623 is about 8503.2125105750. The cubic root of 72304623 is about 416.6026441009.

It can be divided in two parts, 72304 and 623, that added together give a palindrome (72927).

The spelling of 72304623 in words is "seventy-two million, three hundred four thousand, six hundred twenty-three".