1427881389 has 16 divisors (see below), whose sum is σ = 2088529920. Its totient is φ = 860544560.

The previous prime is 1427881373. The next prime is 1427881397. The reversal of 1427881389 is 9831887241.

It is a cyclic number.

It is not a de Polignac number, because 1427881389 - 2⁴ = 1427881373 is a prime.

It is a super-2 number, since 2×1427881389² = 4077690522105138642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1427881309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114957 + ... + 126770.

It is an arithmetic number, because the mean of its divisors is an integer number (130533120).

Almost surely, 2^1427881389 is an apocalyptic number.

It is an amenable number.

1427881389 is a deficient number, since it is larger than the sum of its proper divisors (660648531).

1427881389 is a wasteful number, since it uses less digits than its factorization.

1427881389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241920.

The product of its digits is 774144, while the sum is 51.

The square root of 1427881389 is about 37787.3178328391. The cubic root of 1427881389 is about 1126.0665149312.

The spelling of 1427881389 in words is "one billion, four hundred twenty-seven million, eight hundred eighty-one thousand, three hundred eighty-nine".