128387512 has 32 divisors (see below), whose sum is σ = 263418480. Its totient is φ = 58178560.

The previous prime is 128387459. The next prime is 128387527. The reversal of 128387512 is 215783821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28998 + ... + 33130.

Almost surely, 2^128387512 is an apocalyptic number.

It is an amenable number.

128387512 is an abundant number, since it is smaller than the sum of its proper divisors (135030968).

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

128387512 is a wasteful number, since it uses less digits than its factorization.

128387512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4503 (or 4499 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 128387512 is about 11330.8213294536. The cubic root of 128387512 is about 504.4764852216.

It can be divided in two parts, 128 and 387512, that added together give a triangular number (387640 = T₈₈₀).

The spelling of 128387512 in words is "one hundred twenty-eight million, three hundred eighty-seven thousand, five hundred twelve".