127890399 has 16 divisors (see below), whose sum is σ = 209871872. Its totient is φ = 67458528.

The previous prime is 127890331. The next prime is 127890403. The reversal of 127890399 is 993098721.

It is not a de Polignac number, because 127890399 - 2⁷ = 127890271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127892399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233959 + ... + 234504.

It is an arithmetic number, because the mean of its divisors is an integer number (13116992).

Almost surely, 2^127890399 is an apocalyptic number.

127890399 is a deficient number, since it is larger than the sum of its proper divisors (81981473).

127890399 is a wasteful number, since it uses less digits than its factorization.

127890399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468486.

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 127890399 is about 11308.8637360258. The cubic root of 127890399 is about 503.8245365841.

The spelling of 127890399 in words is "one hundred twenty-seven million, eight hundred ninety thousand, three hundred ninety-nine".