1442387817 has 20 divisors (see below), whose sum is σ = 2320424260. Its totient is φ = 887622624.

The previous prime is 1442387813. The next prime is 1442387827. The reversal of 1442387817 is 7187832441.

It can be written as a sum of positive squares in 2 ways, for example, as 362673936 + 1079713881 = 19044^2 + 32859^2 .

It is not a de Polignac number, because 1442387817 - 2² = 1442387813 is a prime.

It is a super-2 number, since 2×1442387817² = 4160965229260050978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1442387813) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 683842 + ... + 685947.

It is an arithmetic number, because the mean of its divisors is an integer number (116021213).

Almost surely, 2^1442387817 is an apocalyptic number.

It is an amenable number.

1442387817 is a deficient number, since it is larger than the sum of its proper divisors (878036443).

1442387817 is a wasteful number, since it uses less digits than its factorization.

1442387817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369814 (or 1369805 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 1442387817 is about 37978.7811415796. The cubic root of 1442387817 is about 1129.8670627022.

The spelling of 1442387817 in words is "one billion, four hundred forty-two million, three hundred eighty-seven thousand, eight hundred seventeen".