128417892 has 12 divisors (see below), whose sum is σ = 299641776. Its totient is φ = 42805960.

The previous prime is 128417873. The next prime is 128417893. The reversal of 128417892 is 298714821.

128417892 is nontrivially palindromic in base 5.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (128417893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5350734 + ... + 5350757.

It is an arithmetic number, because the mean of its divisors is an integer number (24970148).

Almost surely, 2^128417892 is an apocalyptic number.

128417892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128417892 is an abundant number, since it is smaller than the sum of its proper divisors (171223884).

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

128417892 is a wasteful number, since it uses less digits than its factorization.

128417892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10701498 (or 10701496 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 128417892 is about 11332.1618414140. The cubic root of 128417892 is about 504.5162730656.

The spelling of 128417892 in words is "one hundred twenty-eight million, four hundred seventeen thousand, eight hundred ninety-two".