128534492 has 12 divisors (see below), whose sum is σ = 225165360. Its totient is φ = 64201536.

The previous prime is 128534491. The next prime is 128534521. The reversal of 128534492 is 294435821.

It is a super-2 number, since 2×128534492² = 33042231267396128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128534491) 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, 11888 + ... + 19959.

It is an arithmetic number, because the mean of its divisors is an integer number (18763780).

Almost surely, 2^128534492 is an apocalyptic number.

It is an amenable number.

128534492 is a deficient number, since it is larger than the sum of its proper divisors (96630868).

128534492 is a wasteful number, since it uses less digits than its factorization.

128534492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32860 (or 32858 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 128534492 is about 11337.3053235767. The cubic root of 128534492 is about 504.6689226203.

The spelling of 128534492 in words is "one hundred twenty-eight million, five hundred thirty-four thousand, four hundred ninety-two".