127889690 has 16 divisors (see below), whose sum is σ = 230604192. Its totient is φ = 51066384.

The previous prime is 127889687. The next prime is 127889711. The reversal of 127889690 is 96988721.

It is a super-2 number, since 2×127889690² = 32711545616592200, which contains 22 as substring.

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, 5024 + ... + 16763.

It is an arithmetic number, because the mean of its divisors is an integer number (14412762).

Almost surely, 2^127889690 is an apocalyptic number.

127889690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127889690 is a deficient number, since it is larger than the sum of its proper divisors (102714502).

127889690 is a wasteful number, since it uses less digits than its factorization.

127889690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22381.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 127889690 is about 11308.8323888897. The cubic root of 127889690 is about 503.8236055466.

The spelling of 127889690 in words is "one hundred twenty-seven million, eight hundred eighty-nine thousand, six hundred ninety".