72000345 has 8 divisors (see below), whose sum is σ = 115200576. Its totient is φ = 38400176.

The previous prime is 72000343. The next prime is 72000353. The reversal of 72000345 is 54300027.

It is a happy number.

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 72000345 - 2¹ = 72000343 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72000343) 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, 2399997 + ... + 2400026.

It is an arithmetic number, because the mean of its divisors is an integer number (14400072).

Almost surely, 2^72000345 is an apocalyptic number.

It is an amenable number.

72000345 is a deficient number, since it is larger than the sum of its proper divisors (43200231).

72000345 is a wasteful number, since it uses less digits than its factorization.

72000345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4800031.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 72000345 is about 8485.3017035342. The cubic root of 72000345 is about 416.0174290805.

The spelling of 72000345 in words is "seventy-two million, three hundred forty-five", and thus it is an aban number.