1021444140 has 48 divisors (see below), whose sum is σ = 2866752000. Its totient is φ = 271746240.

The previous prime is 1021444129. The next prime is 1021444153. The reversal of 1021444140 is 414441201.

It is a super-2 number, since 2×1021444140² = 2086696262280679200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6111 + ... + 45609.

It is an arithmetic number, because the mean of its divisors is an integer number (59724000).

Almost surely, 2^1021444140 is an apocalyptic number.

1021444140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021444140 is an abundant number, since it is smaller than the sum of its proper divisors (1845307860).

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

1021444140 is a wasteful number, since it uses less digits than its factorization.

1021444140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39942 (or 39940 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1021444140 is about 31960.0397371468. The cubic root of 1021444140 is about 1007.0975522386.

Adding to 1021444140 its reverse (414441201), we get a palindrome (1435885341).

The spelling of 1021444140 in words is "one billion, twenty-one million, four hundred forty-four thousand, one hundred forty".