128477696 has 80 divisors (see below), whose sum is σ = 276946560. Its totient is φ = 59351040.

The previous prime is 128477669. The next prime is 128477711. The reversal of 128477696 is 696774821.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

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, 457076 + ... + 457356.

It is an arithmetic number, because the mean of its divisors is an integer number (3461832).

Almost surely, 2^128477696 is an apocalyptic number.

128477696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128477696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138473280).

128477696 is an abundant number, since it is smaller than the sum of its proper divisors (148468864).

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

128477696 is an equidigital number, since it uses as much as digits as its factorization.

128477696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 349 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 128477696 is about 11334.8002187952. The cubic root of 128477696 is about 504.5945783761.

The spelling of 128477696 in words is "one hundred twenty-eight million, four hundred seventy-seven thousand, six hundred ninety-six".