128927808 has 56 divisors (see below), whose sum is σ = 379028960. Its totient is φ = 42975360.

The previous prime is 128927807. The next prime is 128927809. The reversal of 128927808 is 808729821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128927807) and next prime (128927809).

It is not an unprimeable number, because it can be changed into a prime (128927807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35578 + ... + 39033.

Almost surely, 2^128927808 is an apocalyptic number.

128927808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128927808 is an abundant number, since it is smaller than the sum of its proper divisors (250101152).

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

128927808 is an equidigital number, since it uses as much as digits as its factorization.

128927808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74632 (or 74616 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 128927808 is about 11354.6381712497. The cubic root of 128927808 is about 505.1831613483.

The spelling of 128927808 in words is "one hundred twenty-eight million, nine hundred twenty-seven thousand, eight hundred eight".