788128923 has 4 divisors (see below), whose sum is σ = 1050838568. Its totient is φ = 525419280.

The previous prime is 788128883. The next prime is 788128931. The reversal of 788128923 is 329821887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329821887 = 3 ⋅109940629.

It is not a de Polignac number, because 788128923 - 2¹⁷ = 787997851 is a prime.

It is a super-2 number, since 2×788128923² = 1242294398538279858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (788128963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131354818 + ... + 131354823.

It is an arithmetic number, because the mean of its divisors is an integer number (262709642).

Almost surely, 2^788128923 is an apocalyptic number.

788128923 is a deficient number, since it is larger than the sum of its proper divisors (262709645).

788128923 is a wasteful number, since it uses less digits than its factorization.

788128923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262709644.

The product of its digits is 387072, while the sum is 48.

The square root of 788128923 is about 28073.6339471754. The cubic root of 788128923 is about 923.7031441299.

The spelling of 788128923 in words is "seven hundred eighty-eight million, one hundred twenty-eight thousand, nine hundred twenty-three".