7728711123 has 8 divisors (see below), whose sum is σ = 11777083648. Its totient is φ = 4416406344.

The previous prime is 7728711113. The next prime is 7728711127. The reversal of 7728711123 is 3211178277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7728711123 - 2¹⁴ = 7728694739 is a prime.

It is a super-2 number, since 2×7728711123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7728711127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184016911 + ... + 184016952.

It is an arithmetic number, because the mean of its divisors is an integer number (1472135456).

Almost surely, 2^7728711123 is an apocalyptic number.

7728711123 is a deficient number, since it is larger than the sum of its proper divisors (4048372525).

7728711123 is a wasteful number, since it uses less digits than its factorization.

7728711123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368033873.

The product of its digits is 32928, while the sum is 39.

The square root of 7728711123 is about 87913.0884624127. The cubic root of 7728711123 is about 1977.1321201632.

It can be divided in two parts, 77287 and 11123, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 7728711123 in words is "seven billion, seven hundred twenty-eight million, seven hundred eleven thousand, one hundred twenty-three".