128494386 has 12 divisors (see below), whose sum is σ = 278404542. Its totient is φ = 42831456.

The previous prime is 128494361. The next prime is 128494403. The reversal of 128494386 is 683494821.

It is a happy number.

128494386 is a `hidden beast` number, since 128 + 494 + 38 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 102637161 + 25857225 = 10131^2 + 5085^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3569271 + ... + 3569306.

Almost surely, 2^128494386 is an apocalyptic number.

128494386 is an abundant number, since it is smaller than the sum of its proper divisors (149910156).

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

128494386 is a wasteful number, since it uses less digits than its factorization.

128494386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138585 (or 7138582 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 128494386 is about 11335.5364231253. The cubic root of 128494386 is about 504.6164273536.

The spelling of 128494386 in words is "one hundred twenty-eight million, four hundred ninety-four thousand, three hundred eighty-six".