128632031 has 16 divisors (see below), whose sum is σ = 146838528. Its totient is φ = 111540000.

The previous prime is 128632019. The next prime is 128632037. The reversal of 128632031 is 130236821.

It is not a de Polignac number, because 128632031 - 2¹⁸ = 128369887 is a prime.

It is a super-2 number, since 2×128632031² = 33092398798369922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128632037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170906 + ... + 171656.

It is an arithmetic number, because the mean of its divisors is an integer number (9177408).

Almost surely, 2^128632031 is an apocalyptic number.

128632031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128632031 is a deficient number, since it is larger than the sum of its proper divisors (18206497).

128632031 is a wasteful number, since it uses less digits than its factorization.

128632031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 128632031 is about 11341.6061913646. The cubic root of 128632031 is about 504.7965471332.

Adding to 128632031 its reverse (130236821), we get a palindrome (258868852).

The spelling of 128632031 in words is "one hundred twenty-eight million, six hundred thirty-two thousand, thirty-one".