72760645 has 4 divisors (see below), whose sum is σ = 87312780. Its totient is φ = 58208512.

The previous prime is 72760637. The next prime is 72760669. The reversal of 72760645 is 54606727.

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 23213124 + 49547521 = 4818^2 + 7039^2 .

It is a cyclic number.

It is not a de Polignac number, because 72760645 - 2³ = 72760637 is a prime.

It is a super-2 number, since 2×72760645² = 10588222921632050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7276060 + ... + 7276069.

It is an arithmetic number, because the mean of its divisors is an integer number (21828195).

Almost surely, 2^72760645 is an apocalyptic number.

It is an amenable number.

72760645 is a deficient number, since it is larger than the sum of its proper divisors (14552135).

72760645 is a wasteful number, since it uses less digits than its factorization.

72760645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14552134.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 72760645 is about 8529.9850527419. The cubic root of 72760645 is about 417.4766406188.

The spelling of 72760645 in words is "seventy-two million, seven hundred sixty thousand, six hundred forty-five".