1442731788 has 72 divisors (see below), whose sum is σ = 3971276400. Its totient is φ = 439883136.

The previous prime is 1442731783. The next prime is 1442731841. The reversal of 1442731788 is 8871372441.

It is not an unprimeable number, because it can be changed into a prime (1442731783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16531 + ... + 56202.

Almost surely, 2^1442731788 is an apocalyptic number.

1442731788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1442731788 is an abundant number, since it is smaller than the sum of its proper divisors (2528544612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1442731788 is a wasteful number, since it uses less digits than its factorization.

1442731788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72791 (or 72786 counting only the distinct ones).

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

The square root of 1442731788 is about 37983.3093344959. The cubic root of 1442731788 is about 1129.9568699439.

The spelling of 1442731788 in words is "one billion, four hundred forty-two million, seven hundred thirty-one thousand, seven hundred eighty-eight".