128477085 has 32 divisors (see below), whose sum is σ = 229036032. Its totient is φ = 60962880.

The previous prime is 128477059. The next prime is 128477087. The reversal of 128477085 is 580774821.

It is not a de Polignac number, because 128477085 - 2¹² = 128472989 is a prime.

It is a super-2 number, since 2×128477085² = 33012722740194450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128477087) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529 + ... + 16038.

It is an arithmetic number, because the mean of its divisors is an integer number (7157376).

Almost surely, 2^128477085 is an apocalyptic number.

128477085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128477085 is a deficient number, since it is larger than the sum of its proper divisors (100558947).

128477085 is a wasteful number, since it uses less digits than its factorization.

128477085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16633.

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 128477085 is about 11334.7732663693. The cubic root of 128477085 is about 504.5937784765.

The spelling of 128477085 in words is "one hundred twenty-eight million, four hundred seventy-seven thousand, eighty-five".