72646385 has 8 divisors (see below), whose sum is σ = 99629376. Its totient is φ = 49814640.

The previous prime is 72646373. The next prime is 72646403. The reversal of 72646385 is 58364627.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-72646385 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037771 + ... + 1037840.

It is an arithmetic number, because the mean of its divisors is an integer number (12453672).

Almost surely, 2^72646385 is an apocalyptic number.

It is an amenable number.

72646385 is a deficient number, since it is larger than the sum of its proper divisors (26982991).

72646385 is a wasteful number, since it uses less digits than its factorization.

72646385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075623.

The product of its digits is 241920, while the sum is 41.

The square root of 72646385 is about 8523.2848714565. The cubic root of 72646385 is about 417.2579973680.

The spelling of 72646385 in words is "seventy-two million, six hundred forty-six thousand, three hundred eighty-five".