128012136 has 32 divisors (see below), whose sum is σ = 365749440. Its totient is φ = 36574848.

The previous prime is 128012111. The next prime is 128012141. The reversal of 128012136 is 631210821.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 380821 + ... + 381156.

It is an arithmetic number, because the mean of its divisors is an integer number (11429670).

Almost surely, 2^128012136 is an apocalyptic number.

It is an amenable number.

128012136 is an abundant number, since it is smaller than the sum of its proper divisors (237737304).

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

128012136 is a wasteful number, since it uses less digits than its factorization.

128012136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761993 (or 761989 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 128012136 is about 11314.2448267659. The cubic root of 128012136 is about 503.9843469565.

Adding to 128012136 its reverse (631210821), we get a palindrome (759222957).

The spelling of 128012136 in words is "one hundred twenty-eight million, twelve thousand, one hundred thirty-six".