72678785 has 8 divisors (see below), whose sum is σ = 90222120. Its totient is φ = 56137984.

The previous prime is 72678769. The next prime is 72678811. The reversal of 72678785 is 58787627.

It can be written as a sum of positive squares in 4 ways, for example, as 16008001 + 56670784 = 4001^2 + 7528^2 .

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 72678785 - 2⁴ = 72678769 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 250472 + ... + 250761.

It is an arithmetic number, because the mean of its divisors is an integer number (11277765).

Almost surely, 2^72678785 is an apocalyptic number.

It is an amenable number.

72678785 is a deficient number, since it is larger than the sum of its proper divisors (17543335).

72678785 is a wasteful number, since it uses less digits than its factorization.

72678785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501267.

The product of its digits is 1317120, while the sum is 50.

The square root of 72678785 is about 8525.1853352288. The cubic root of 72678785 is about 417.3200199531.

The spelling of 72678785 in words is "seventy-two million, six hundred seventy-eight thousand, seven hundred eighty-five".