128930739 has 8 divisors (see below), whose sum is σ = 196465920. Its totient is φ = 73674696.

The previous prime is 128930731. The next prime is 128930749. The reversal of 128930739 is 937039821.

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

It is not a de Polignac number, because 128930739 - 2³ = 128930731 is a prime.

It is a super-2 number, since 2×128930739² = 33246270918172242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128930739.

It is not an unprimeable number, because it can be changed into a prime (128930731) 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, 3069759 + ... + 3069800.

It is an arithmetic number, because the mean of its divisors is an integer number (24558240).

Almost surely, 2^128930739 is an apocalyptic number.

128930739 is a deficient number, since it is larger than the sum of its proper divisors (67535181).

128930739 is an equidigital number, since it uses as much as digits as its factorization.

128930739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6139569.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 128930739 is about 11354.7672367160. The cubic root of 128930739 is about 505.1869895387.

The spelling of 128930739 in words is "one hundred twenty-eight million, nine hundred thirty thousand, seven hundred thirty-nine".