127388538 has 20 divisors (see below), whose sum is σ = 285445050. Its totient is φ = 42462792.

The previous prime is 127388533. The next prime is 127388549. The reversal of 127388538 is 835883721.

It can be written as a sum of positive squares in only one way, i.e., 125955729 + 1432809 = 11223^2 + 1197^2 .

It is a super-2 number, since 2×127388538² = 32455679227554888, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 127388493 and 127388502.

It is not an unprimeable number, because it can be changed into a prime (127388533) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 393013 + ... + 393336.

Almost surely, 2^127388538 is an apocalyptic number.

127388538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

127388538 is an abundant number, since it is smaller than the sum of its proper divisors (158056512).

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

127388538 is an equidigital number, since it uses as much as digits as its factorization.

127388538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786363 (or 786354 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 127388538 is about 11286.6530911515. The cubic root of 127388538 is about 503.1646451174.

The spelling of 127388538 in words is "one hundred twenty-seven million, three hundred eighty-eight thousand, five hundred thirty-eight".