72323307 has 16 divisors (see below), whose sum is σ = 122452480. Its totient is φ = 41327496.

The previous prime is 72323281. The next prime is 72323309. The reversal of 72323307 is 70332327.

It is a happy number.

It is not a de Polignac number, because 72323307 - 2⁷ = 72323179 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72323309) 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, 191143 + ... + 191520.

It is an arithmetic number, because the mean of its divisors is an integer number (7653280).

Almost surely, 2^72323307 is an apocalyptic number.

72323307 is a deficient number, since it is larger than the sum of its proper divisors (50129173).

72323307 is a wasteful number, since it uses less digits than its factorization.

72323307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382679 (or 382673 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 27.

The square root of 72323307 is about 8504.3110832095. The cubic root of 72323307 is about 416.6385253172.

The spelling of 72323307 in words is "seventy-two million, three hundred twenty-three thousand, three hundred seven".