128741823 has 24 divisors (see below), whose sum is σ = 216541728. Its totient is φ = 72176832.

The previous prime is 128741819. The next prime is 128741827. The reversal of 128741823 is 328147821.

It is an interprime number because it is at equal distance from previous prime (128741819) and next prime (128741827).

It is not a de Polignac number, because 128741823 - 2² = 128741819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128741827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15940 + ... + 22617.

It is an arithmetic number, because the mean of its divisors is an integer number (9022572).

Almost surely, 2^128741823 is an apocalyptic number.

128741823 is a deficient number, since it is larger than the sum of its proper divisors (87799905).

128741823 is a wasteful number, since it uses less digits than its factorization.

128741823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38623 (or 38620 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 128741823 is about 11346.4453905177. The cubic root of 128741823 is about 504.9401268755.

The spelling of 128741823 in words is "one hundred twenty-eight million, seven hundred forty-one thousand, eight hundred twenty-three".