128031516 has 30 divisors (see below), whose sum is σ = 334700520. Its totient is φ = 42677064.

The previous prime is 128031473. The next prime is 128031523. The reversal of 128031516 is 615130821.

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

It is a self number, because there is not a number n which added to its sum of digits gives 128031516.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 197256 + ... + 197903.

It is an arithmetic number, because the mean of its divisors is an integer number (11156684).

Almost surely, 2^128031516 is an apocalyptic number.

It is an amenable number.

128031516 is an abundant number, since it is smaller than the sum of its proper divisors (206669004).

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

128031516 is a wasteful number, since it uses less digits than its factorization.

128031516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395175 (or 395164 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 128031516 is about 11315.1012368427. The cubic root of 128031516 is about 504.0097787218.

The spelling of 128031516 in words is "one hundred twenty-eight million, thirty-one thousand, five hundred sixteen".