139128300 has 108 divisors (see below), whose sum is σ = 449250760. Its totient is φ = 36937440.

The previous prime is 139128281. The next prime is 139128331. The reversal of 139128300 is 3821931.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 612787 + ... + 613013.

Almost surely, 2^139128300 is an apocalyptic number.

139128300 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 139128300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224625380).

139128300 is an abundant number, since it is smaller than the sum of its proper divisors (310122460).

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

139128300 is a wasteful number, since it uses less digits than its factorization.

139128300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 139128300 is about 11795.2659995441. The cubic root of 139128300 is about 518.1694759085.

Multiplying 139128300 by its sum of digits (27), we get a square (3756464100 = 61290²).

139128300 divided by its sum of digits (27) gives a square (5152900 = 2270²).

The spelling of 139128300 in words is "one hundred thirty-nine million, one hundred twenty-eight thousand, three hundred".