128037900 has 72 divisors (see below), whose sum is σ = 383256720. Its totient is φ = 32963840.

The previous prime is 128037881. The next prime is 128037901. The reversal of 128037900 is 9730821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (128037901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1342 + ... + 16058.

It is an arithmetic number, because the mean of its divisors is an integer number (5323010).

Almost surely, 2^128037900 is an apocalyptic number.

128037900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128037900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191628360).

128037900 is an abundant number, since it is smaller than the sum of its proper divisors (255218820).

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

128037900 is a wasteful number, since it uses less digits than its factorization.

128037900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14763 (or 14756 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 128037900 is about 11315.3833342048. The cubic root of 128037900 is about 504.0181556826.

The spelling of 128037900 in words is "one hundred twenty-eight million, thirty-seven thousand, nine hundred".