128631334 has 16 divisors (see below), whose sum is σ = 209735568. Its totient is φ = 58812192.

The previous prime is 128631331. The next prime is 128631337. The reversal of 128631334 is 433136821.

It is an interprime number because it is at equal distance from previous prime (128631331) and next prime (128631337).

It is a junction number, because it is equal to n+sod(n) for n = 128631296 and 128631305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128631331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20337 + ... + 25900.

It is an arithmetic number, because the mean of its divisors is an integer number (13108473).

Almost surely, 2^128631334 is an apocalyptic number.

128631334 is a deficient number, since it is larger than the sum of its proper divisors (81104234).

128631334 is a wasteful number, since it uses less digits than its factorization.

128631334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46359.

The product of its digits is 10368, while the sum is 31.

The square root of 128631334 is about 11341.5754637528. The cubic root of 128631334 is about 504.7956353752.

The spelling of 128631334 in words is "one hundred twenty-eight million, six hundred thirty-one thousand, three hundred thirty-four".