128726946 has 24 divisors (see below), whose sum is σ = 281109504. Its totient is φ = 42570360.

The previous prime is 128726909. The next prime is 128726963. The reversal of 128726946 is 649627821.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25870 + ... + 30441.

It is an arithmetic number, because the mean of its divisors is an integer number (11712896).

Almost surely, 2^128726946 is an apocalyptic number.

128726946 is an abundant number, since it is smaller than the sum of its proper divisors (152382558).

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

128726946 is a wasteful number, since it uses less digits than its factorization.

128726946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56446 (or 56443 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 128726946 is about 11345.7897918126. The cubic root of 128726946 is about 504.9206763621.

The spelling of 128726946 in words is "one hundred twenty-eight million, seven hundred twenty-six thousand, nine hundred forty-six".