72840307 has 8 divisors (see below), whose sum is σ = 74075456. Its totient is φ = 71615232.

The previous prime is 72840277. The next prime is 72840337. The reversal of 72840307 is 70304827.

It is an interprime number because it is at equal distance from previous prime (72840277) and next prime (72840337).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72840307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72840337) 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, 12838 + ... + 17620.

It is an arithmetic number, because the mean of its divisors is an integer number (9259432).

Almost surely, 2^72840307 is an apocalyptic number.

72840307 is a deficient number, since it is larger than the sum of its proper divisors (1235149).

72840307 is a wasteful number, since it uses less digits than its factorization.

72840307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 72840307 is about 8534.6533028589. The cubic root of 72840307 is about 417.6289431644.

The spelling of 72840307 in words is "seventy-two million, eight hundred forty thousand, three hundred seven".