72628028785 has 8 divisors (see below), whose sum is σ = 93857760360. Its totient is φ = 53633005824.

The previous prime is 72628028777. The next prime is 72628028797. The reversal of 72628028785 is 58782082627.

It can be written as a sum of positive squares in 4 ways, for example, as 6817309489 + 65810719296 = 82567^2 + 256536^2 .

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 72628028785 - 2³ = 72628028777 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, 558677080 + ... + 558677209.

It is an arithmetic number, because the mean of its divisors is an integer number (11732220045).

Almost surely, 2^72628028785 is an apocalyptic number.

It is an amenable number.

72628028785 is a deficient number, since it is larger than the sum of its proper divisors (21229731575).

72628028785 is a wasteful number, since it uses less digits than its factorization.

72628028785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117354307.

The product of its (nonzero) digits is 6021120, while the sum is 55.

The spelling of 72628028785 in words is "seventy-two billion, six hundred twenty-eight million, twenty-eight thousand, seven hundred eighty-five".