128442892 has 24 divisors (see below), whose sum is σ = 230630400. Its totient is φ = 62556816.

The previous prime is 128442877. The next prime is 128442911. The reversal of 128442892 is 298244821.

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, 81609 + ... + 83167.

It is an arithmetic number, because the mean of its divisors is an integer number (9609600).

Almost surely, 2^128442892 is an apocalyptic number.

It is an amenable number.

128442892 is a deficient number, since it is larger than the sum of its proper divisors (102187508).

128442892 is a wasteful number, since it uses less digits than its factorization.

128442892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085 (or 2083 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 128442892 is about 11333.2648429303. The cubic root of 128442892 is about 504.5490101665.

The spelling of 128442892 in words is "one hundred twenty-eight million, four hundred forty-two thousand, eight hundred ninety-two".