72860765 has 4 divisors (see below), whose sum is σ = 87432924. Its totient is φ = 58288608.

The previous prime is 72860761. The next prime is 72860773. The reversal of 72860765 is 56706827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54007801 + 18852964 = 7349^2 + 4342^2 .

It is a cyclic number.

It is not a de Polignac number, because 72860765 - 2² = 72860761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72860761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7286072 + ... + 7286081.

It is an arithmetic number, because the mean of its divisors is an integer number (21858231).

Almost surely, 2^72860765 is an apocalyptic number.

It is an amenable number.

72860765 is a deficient number, since it is larger than the sum of its proper divisors (14572159).

72860765 is a wasteful number, since it uses less digits than its factorization.

72860765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14572158.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 72860765 is about 8535.8517442608. The cubic root of 72860765 is about 417.6680380627.

The spelling of 72860765 in words is "seventy-two million, eight hundred sixty thousand, seven hundred sixty-five".