72340387 has 8 divisors (see below), whose sum is σ = 82729472. Its totient is φ = 61965000.

The previous prime is 72340363. The next prime is 72340397. The reversal of 72340387 is 78304327.

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 72340387 - 2⁷ = 72340259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72340337) 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, 13462 + ... + 18052.

It is an arithmetic number, because the mean of its divisors is an integer number (10341184).

Almost surely, 2^72340387 is an apocalyptic number.

72340387 is a deficient number, since it is larger than the sum of its proper divisors (10389085).

72340387 is a wasteful number, since it uses less digits than its factorization.

72340387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6849.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 72340387 is about 8505.3152204959. The cubic root of 72340387 is about 416.6713207658.

It can be divided in two parts, 72340 and 387, that added together give a palindrome (72727).

The spelling of 72340387 in words is "seventy-two million, three hundred forty thousand, three hundred eighty-seven".