128216382 has 32 divisors (see below), whose sum is σ = 295218432. Its totient is φ = 36364224.

The previous prime is 128216323. The next prime is 128216393. The reversal of 128216382 is 283612821.

It is a super-2 number, since 2×128216382² = 32878881226339848, which contains 22 as substring.

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, 5388 + ... + 16895.

It is an arithmetic number, because the mean of its divisors is an integer number (9225576).

Almost surely, 2^128216382 is an apocalyptic number.

128216382 is an abundant number, since it is smaller than the sum of its proper divisors (167002050).

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

128216382 is a wasteful number, since it uses less digits than its factorization.

128216382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22432.

The product of its digits is 9216, while the sum is 33.

The square root of 128216382 is about 11323.2672846666. The cubic root of 128216382 is about 504.2522436646.

The spelling of 128216382 in words is "one hundred twenty-eight million, two hundred sixteen thousand, three hundred eighty-two".