128152739 has 32 divisors (see below), whose sum is σ = 160392960. Its totient is φ = 100656000.

The previous prime is 128152693. The next prime is 128152813. The reversal of 128152739 is 937251821.

It is a cyclic number.

It is not a de Polignac number, because 128152739 - 2⁸ = 128152483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128157739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 274184 + ... + 274650.

It is an arithmetic number, because the mean of its divisors is an integer number (5012280).

Almost surely, 2^128152739 is an apocalyptic number.

128152739 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

128152739 is a deficient number, since it is larger than the sum of its proper divisors (32240221).

128152739 is a wasteful number, since it uses less digits than its factorization.

128152739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its digits is 30240, while the sum is 38.

The square root of 128152739 is about 11320.4566604002. The cubic root of 128152739 is about 504.1687976536.

The spelling of 128152739 in words is "one hundred twenty-eight million, one hundred fifty-two thousand, seven hundred thirty-nine".