128961762 has 16 divisors (see below), whose sum is σ = 273095712. Its totient is φ = 40458560.

The previous prime is 128961757. The next prime is 128961809. The reversal of 128961762 is 267169821.

It is a super-2 number, since 2×128961762² = 33262272116289288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632064 + ... + 632267.

It is an arithmetic number, because the mean of its divisors is an integer number (17068482).

Almost surely, 2^128961762 is an apocalyptic number.

128961762 is an abundant number, since it is smaller than the sum of its proper divisors (144133950).

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

128961762 is a wasteful number, since it uses less digits than its factorization.

128961762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264353.

The product of its digits is 72576, while the sum is 42.

The square root of 128961762 is about 11356.1332327514. The cubic root of 128961762 is about 505.2275052431.

The spelling of 128961762 in words is "one hundred twenty-eight million, nine hundred sixty-one thousand, seven hundred sixty-two".