1012989140 has 24 divisors (see below), whose sum is σ = 2200632840. Its totient is φ = 391223168.

The previous prime is 1012989059. The next prime is 1012989143. The reversal of 1012989140 is 419892101.

It can be written as a sum of positive squares in 4 ways, for example, as 374112964 + 638876176 = 19342^2 + 25276^2 .

It is a super-2 number, since 2×1012989140² = 2052293995515879200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1012989140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012989143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872687 + ... + 873846.

It is an arithmetic number, because the mean of its divisors is an integer number (91693035).

Almost surely, 2^1012989140 is an apocalyptic number.

1012989140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012989140 is an abundant number, since it is smaller than the sum of its proper divisors (1187643700).

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

1012989140 is a wasteful number, since it uses less digits than its factorization.

1012989140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746571 (or 1746569 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 1012989140 is about 31827.4903189051. The cubic root of 1012989140 is about 1004.3111010331.

The spelling of 1012989140 in words is "one billion, twelve million, nine hundred eighty-nine thousand, one hundred forty".