128492 has 24 divisors (see below), whose sum is σ = 277536. Its totient is φ = 50688.

The previous prime is 128489. The next prime is 128509. The reversal of 128492 is 294821.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128492.

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, 188 + ... + 540.

It is an arithmetic number, because the mean of its divisors is an integer number (11564).

2¹²⁸⁴⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138768).

128492 is an abundant number, since it is smaller than the sum of its proper divisors (149044).

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

128492 is a wasteful number, since it uses less digits than its factorization.

128492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 375 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 128492 is about 358.4578078380. The cubic root of 128492 is about 50.4613303943.

The spelling of 128492 in words is "one hundred twenty-eight thousand, four hundred ninety-two".