127839890 has 16 divisors (see below), whose sum is σ = 230347800. Its totient is φ = 51083520.

The previous prime is 127839883. The next prime is 127839893. The reversal of 127839890 is 98938721.

It can be written as a sum of positive squares in 4 ways, for example, as 117657409 + 10182481 = 10847^2 + 3191^2 .

It is not an unprimeable number, because it can be changed into a prime (127839893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4586 + ... + 16634.

Almost surely, 2^127839890 is an apocalyptic number.

127839890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127839890 is a deficient number, since it is larger than the sum of its proper divisors (102507910).

127839890 is a wasteful number, since it uses less digits than its factorization.

127839890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13117.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 127839890 is about 11306.6303556807. The cubic root of 127839890 is about 503.7582010745.

The spelling of 127839890 in words is "one hundred twenty-seven million, eight hundred thirty-nine thousand, eight hundred ninety".