3128739 has 8 divisors (see below), whose sum is σ = 4188240. Its totient is φ = 2077536.

The previous prime is 3128729. The next prime is 3128747. The reversal of 3128739 is 9378213.

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

It is not a de Polignac number, because 3128739 - 2⁷ = 3128611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3128729) 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, 1132 + ... + 2745.

It is an arithmetic number, because the mean of its divisors is an integer number (523530).

Almost surely, 2^3128739 is an apocalyptic number.

3128739 is a deficient number, since it is larger than the sum of its proper divisors (1059501).

3128739 is a wasteful number, since it uses less digits than its factorization.

3128739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149.

The product of its digits is 9072, while the sum is 33.

The square root of 3128739 is about 1768.8241857234. The cubic root of 3128739 is about 146.2591724834.

The spelling of 3128739 in words is "three million, one hundred twenty-eight thousand, seven hundred thirty-nine".