128140704 has 96 divisors (see below), whose sum is σ = 378564480. Its totient is φ = 42690240.

The previous prime is 128140699. The next prime is 128140709. The reversal of 128140704 is 407041821.

It is an interprime number because it is at equal distance from previous prime (128140699) and next prime (128140709).

It is a tau number, because it is divible by the number of its divisors (96).

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

It is not an unprimeable number, because it can be changed into a prime (128140709) 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, 69069 + ... + 70899.

It is an arithmetic number, because the mean of its divisors is an integer number (3943380).

Almost surely, 2^128140704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128140704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189282240).

128140704 is an abundant number, since it is smaller than the sum of its proper divisors (250423776).

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

128140704 is an frugal number, since it uses more digits than its factorization.

128140704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1862 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 128140704 is about 11319.9250880914. The cubic root of 128140704 is about 504.1530147644.

The spelling of 128140704 in words is "one hundred twenty-eight million, one hundred forty thousand, seven hundred four".