128951436 has 24 divisors (see below), whose sum is σ = 302218560. Its totient is φ = 42793552.

The previous prime is 128951411. The next prime is 128951513. The reversal of 128951436 is 634159821.

It is a junction number, because it is equal to n+sod(n) for n = 128951394 and 128951403.

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, 20946 + ... + 26393.

It is an arithmetic number, because the mean of its divisors is an integer number (12592440).

Almost surely, 2^128951436 is an apocalyptic number.

It is an amenable number.

128951436 is an abundant number, since it is smaller than the sum of its proper divisors (173267124).

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

128951436 is a wasteful number, since it uses less digits than its factorization.

128951436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47573 (or 47571 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 128951436 is about 11355.6785794597. The cubic root of 128951436 is about 505.2140203197.

It can be divided in two parts, 1289 and 51436, that added together give a palindrome (52725).

The spelling of 128951436 in words is "one hundred twenty-eight million, nine hundred fifty-one thousand, four hundred thirty-six".