128631022 has 32 divisors (see below), whose sum is σ = 216153504. Its totient is φ = 57024000.

The previous prime is 128631001. The next prime is 128631023. The reversal of 128631022 is 220136821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128631023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70522 + ... + 72322.

It is an arithmetic number, because the mean of its divisors is an integer number (6754797).

Almost surely, 2^128631022 is an apocalyptic number.

128631022 is a deficient number, since it is larger than the sum of its proper divisors (87522482).

128631022 is a wasteful number, since it uses less digits than its factorization.

128631022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 128631022 is about 11341.5617090417. The cubic root of 128631022 is about 504.7952272415.

Adding to 128631022 its reverse (220136821), we get a palindrome (348767843).

The spelling of 128631022 in words is "one hundred twenty-eight million, six hundred thirty-one thousand, twenty-two".