128149692 has 48 divisors (see below), whose sum is σ = 330355200. Its totient is φ = 38338560.

The previous prime is 128149639. The next prime is 128149729. The reversal of 128149692 is 296941821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4284 + ... + 16572.

It is an arithmetic number, because the mean of its divisors is an integer number (6882400).

Almost surely, 2^128149692 is an apocalyptic number.

128149692 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128149692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165177600).

128149692 is an abundant number, since it is smaller than the sum of its proper divisors (202205508).

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

128149692 is a wasteful number, since it uses less digits than its factorization.

128149692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12386 (or 12384 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 128149692 is about 11320.3220802237. The cubic root of 128149692 is about 504.1648018630.

The spelling of 128149692 in words is "one hundred twenty-eight million, one hundred forty-nine thousand, six hundred ninety-two".