1442887189 has 32 divisors (see below), whose sum is σ = 1646023680. Its totient is φ = 1256654592.

The previous prime is 1442887133. The next prime is 1442887249. The reversal of 1442887189 is 9817882441.

It is a cyclic number.

It is not a de Polignac number, because 1442887189 - 2²¹ = 1440790037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442887109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2868312 + ... + 2868814.

It is an arithmetic number, because the mean of its divisors is an integer number (51438240).

Almost surely, 2^1442887189 is an apocalyptic number.

1442887189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1442887189 is a deficient number, since it is larger than the sum of its proper divisors (203136491).

1442887189 is a wasteful number, since it uses less digits than its factorization.

1442887189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729.

The product of its digits is 1032192, while the sum is 52.

The square root of 1442887189 is about 37985.3549279193. The cubic root of 1442887189 is about 1129.9974388435.

The spelling of 1442887189 in words is "one billion, four hundred forty-two million, eight hundred eighty-seven thousand, one hundred eighty-nine".