128183946 has 96 divisors (see below), whose sum is σ = 301999104. Its totient is φ = 35935200.

The previous prime is 128183933. The next prime is 128183959. The reversal of 128183946 is 649381821.

It is an interprime number because it is at equal distance from previous prime (128183933) and next prime (128183959).

It is a super-2 number, since 2×128183946² = 32862248024261832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128183898 and 128183907.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2727295 + ... + 2727341.

It is an arithmetic number, because the mean of its divisors is an integer number (3145824).

Almost surely, 2^128183946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128183946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150999552).

128183946 is an abundant number, since it is smaller than the sum of its proper divisors (173815158).

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

128183946 is a wasteful number, since it uses less digits than its factorization.

128183946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 137 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 128183946 is about 11321.8349219550. The cubic root of 128183946 is about 504.2097184039.

The spelling of 128183946 in words is "one hundred twenty-eight million, one hundred eighty-three thousand, nine hundred forty-six".