72690641 has 8 divisors (see below), whose sum is σ = 73382400. Its totient is φ = 72002592.

The previous prime is 72690593. The next prime is 72690643. The reversal of 72690641 is 14609627.

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

It is not a de Polignac number, because 72690641 - 2¹⁸ = 72428497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72690643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51260 + ... + 52658.

It is an arithmetic number, because the mean of its divisors is an integer number (9172800).

Almost surely, 2^72690641 is an apocalyptic number.

It is an amenable number.

72690641 is a deficient number, since it is larger than the sum of its proper divisors (691759).

72690641 is a wasteful number, since it uses less digits than its factorization.

72690641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 72690641 is about 8525.8806583250. The cubic root of 72690641 is about 417.3427110182.

The spelling of 72690641 in words is "seventy-two million, six hundred ninety thousand, six hundred forty-one".