128012428 has 6 divisors (see below), whose sum is σ = 224021756. Its totient is φ = 64006212.

The previous prime is 128012413. The next prime is 128012447. The reversal of 128012428 is 824210821.

It is a junction number, because it is equal to n+sod(n) for n = 128012396 and 128012405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16001550 + ... + 16001557.

Almost surely, 2^128012428 is an apocalyptic number.

It is an amenable number.

128012428 is a deficient number, since it is larger than the sum of its proper divisors (96009328).

128012428 is a wasteful number, since it uses less digits than its factorization.

128012428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32003111 (or 32003109 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 128012428 is about 11314.2577308456. The cubic root of 128012428 is about 503.9847301580.

The spelling of 128012428 in words is "one hundred twenty-eight million, twelve thousand, four hundred twenty-eight".