128143736 has 16 divisors (see below), whose sum is σ = 274593840. Its totient is φ = 54918720.

The previous prime is 128143723. The next prime is 128143747. The reversal of 128143736 is 637341821.

It is a junction number, because it is equal to n+sod(n) for n = 128143696 and 128143705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1144085 + ... + 1144196.

It is an arithmetic number, because the mean of its divisors is an integer number (17162115).

Almost surely, 2^128143736 is an apocalyptic number.

It is an amenable number.

128143736 is an abundant number, since it is smaller than the sum of its proper divisors (146450104).

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

128143736 is a wasteful number, since it uses less digits than its factorization.

128143736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288294 (or 2288290 counting only the distinct ones).

The product of its digits is 24192, while the sum is 35.

The square root of 128143736 is about 11320.0590104469. The cubic root of 128143736 is about 504.1569910702.

The spelling of 128143736 in words is "one hundred twenty-eight million, one hundred forty-three thousand, seven hundred thirty-six".