128456412 has 24 divisors (see below), whose sum is σ = 342550656. Its totient is φ = 36701808.

The previous prime is 128456407. The next prime is 128456429. The reversal of 128456412 is 214654821.

It is a happy number.

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, 764538 + ... + 764705.

It is an arithmetic number, because the mean of its divisors is an integer number (14272944).

Almost surely, 2^128456412 is an apocalyptic number.

128456412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128456412 is an abundant number, since it is smaller than the sum of its proper divisors (214094244).

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

128456412 is a wasteful number, since it uses less digits than its factorization.

128456412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529257 (or 1529255 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 128456412 is about 11333.8613014277. The cubic root of 128456412 is about 504.5667126208.

The spelling of 128456412 in words is "one hundred twenty-eight million, four hundred fifty-six thousand, four hundred twelve".