128267746 has 8 divisors (see below), whose sum is σ = 202528080. Its totient is φ = 60758388.

The previous prime is 128267731. The next prime is 128267749. The reversal of 128267746 is 647762821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×128267746² = 32905229327841032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128267749) 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, 1687696 + ... + 1687771.

It is an arithmetic number, because the mean of its divisors is an integer number (25316010).

Almost surely, 2^128267746 is an apocalyptic number.

128267746 is a deficient number, since it is larger than the sum of its proper divisors (74260334).

128267746 is a wasteful number, since it uses less digits than its factorization.

128267746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3375488.

The product of its digits is 225792, while the sum is 43.

The square root of 128267746 is about 11325.5351308448. The cubic root of 128267746 is about 504.3195698362.

The spelling of 128267746 in words is "one hundred twenty-eight million, two hundred sixty-seven thousand, seven hundred forty-six".