127689140 has 24 divisors (see below), whose sum is σ = 270611880. Its totient is φ = 50606208.

The previous prime is 127689103. The next prime is 127689161. The reversal of 127689140 is 41986721.

It can be written as a sum of positive squares in 4 ways, for example, as 66129424 + 61559716 = 8132^2 + 7846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 127689094 and 127689103.

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, 27107 + ... + 31466.

It is an arithmetic number, because the mean of its divisors is an integer number (11275495).

Almost surely, 2^127689140 is an apocalyptic number.

127689140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127689140 is an abundant number, since it is smaller than the sum of its proper divisors (142922740).

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

127689140 is a wasteful number, since it uses less digits than its factorization.

127689140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58691 (or 58689 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 127689140 is about 11299.9619468386. The cubic root of 127689140 is about 503.5601110556.

The spelling of 127689140 in words is "one hundred twenty-seven million, six hundred eighty-nine thousand, one hundred forty".