127397890 has 24 divisors (see below), whose sum is σ = 233586612. Its totient is φ = 50014080.

The previous prime is 127397873. The next prime is 127397909. The reversal of 127397890 is 98793721.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 68277169 + 59120721 = 8263^2 + 7689^2 .

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 127397890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278542 + ... + 278998.

Almost surely, 2^127397890 is an apocalyptic number.

127397890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127397890 is a deficient number, since it is larger than the sum of its proper divisors (106188722).

127397890 is an frugal number, since it uses more digits than its factorization.

127397890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 127397890 is about 11287.0673781988. The cubic root of 127397890 is about 503.1769577914.

The spelling of 127397890 in words is "one hundred twenty-seven million, three hundred ninety-seven thousand, eight hundred ninety".