128195460 has 60 divisors (see below), whose sum is σ = 402158988. Its totient is φ = 34185024.

The previous prime is 128195443. The next prime is 128195471. The reversal of 128195460 is 64591821.

128195460 is a `hidden beast` number, since 1 + 2 + 8 + 195 + 460 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 85266756 + 42928704 = 9234^2 + 6552^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×128195460² = 32868151929223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37947 + ... + 41186.

Almost surely, 2^128195460 is an apocalyptic number.

128195460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128195460 is an abundant number, since it is smaller than the sum of its proper divisors (273963528).

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

128195460 is a wasteful number, since it uses less digits than its factorization.

128195460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79154 (or 79143 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 128195460 is about 11322.3433970181. The cubic root of 128195460 is about 504.2248146701.

The spelling of 128195460 in words is "one hundred twenty-eight million, one hundred ninety-five thousand, four hundred sixty".