128149734 has 8 divisors (see below), whose sum is σ = 256299480. Its totient is φ = 42716576.

The previous prime is 128149733. The next prime is 128149739. The reversal of 128149734 is 437941821.

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

128149734 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 128149692 and 128149701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128149733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10679139 + ... + 10679150.

It is an arithmetic number, because the mean of its divisors is an integer number (32037435).

Almost surely, 2^128149734 is an apocalyptic number.

128149734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128149734 is a wasteful number, since it uses less digits than its factorization.

128149734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21358294.

The product of its digits is 48384, while the sum is 39.

The square root of 128149734 is about 11320.3239352944. The cubic root of 128149734 is about 504.1648569416.

It can be divided in two parts, 1281 and 49734, that added together give a palindrome (51015).

The spelling of 128149734 in words is "one hundred twenty-eight million, one hundred forty-nine thousand, seven hundred thirty-four".