128629140 has 48 divisors (see below), whose sum is σ = 381350592. Its totient is φ = 32283136.

The previous prime is 128629129. The next prime is 128629147. The reversal of 128629140 is 41926821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128629147) 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, 62034 + ... + 64073.

It is an arithmetic number, because the mean of its divisors is an integer number (7944804).

Almost surely, 2^128629140 is an apocalyptic number.

128629140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128629140 is an abundant number, since it is smaller than the sum of its proper divisors (252721452).

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

128629140 is a wasteful number, since it uses less digits than its factorization.

128629140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126136 (or 126134 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 128629140 is about 11341.4787395648. The cubic root of 128629140 is about 504.7927653438.

The spelling of 128629140 in words is "one hundred twenty-eight million, six hundred twenty-nine thousand, one hundred forty".