1172728415 has 4 divisors (see below), whose sum is σ = 1407274104. Its totient is φ = 938182728.

The previous prime is 1172728411. The next prime is 1172728433. The reversal of 1172728415 is 5148272711.

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

It is a cyclic number.

It is not a de Polignac number, because 1172728415 - 2² = 1172728411 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 (1172728411) 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, 117272837 + ... + 117272846.

It is an arithmetic number, because the mean of its divisors is an integer number (351818526).

Almost surely, 2^1172728415 is an apocalyptic number.

1172728415 is a deficient number, since it is larger than the sum of its proper divisors (234545689).

1172728415 is an equidigital number, since it uses as much as digits as its factorization.

1172728415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234545688.

The product of its digits is 31360, while the sum is 38.

The square root of 1172728415 is about 34245.1224994159. The cubic root of 1172728415 is about 1054.5466977350.

The spelling of 1172728415 in words is "one billion, one hundred seventy-two million, seven hundred twenty-eight thousand, four hundred fifteen".