128226388 has 24 divisors (see below), whose sum is σ = 227289440. Its totient is φ = 63292320.

The previous prime is 128226377. The next prime is 128226433. The reversal of 128226388 is 883622821.

It is a self number, because there is not a number n which added to its sum of digits gives 128226388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116770 + ... + 117862.

Almost surely, 2^128226388 is an apocalyptic number.

It is an amenable number.

128226388 is a deficient number, since it is larger than the sum of its proper divisors (99063052).

128226388 is a wasteful number, since it uses less digits than its factorization.

128226388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447 (or 1445 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 128226388 is about 11323.7091096513. The cubic root of 128226388 is about 504.2653605966.

The spelling of 128226388 in words is "one hundred twenty-eight million, two hundred twenty-six thousand, three hundred eighty-eight".