1012889929940 has 36 divisors (see below), whose sum is σ = 2474345402676. Its totient is φ = 347276547072.

The previous prime is 1012889929897. The next prime is 1012889929943. The reversal of 1012889929940 is 499299882101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 308089383364 + 704800546576 = 555058^2 + 839524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012889929943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 516779597 + ... + 516781556.

It is an arithmetic number, because the mean of its divisors is an integer number (68731816741).

Almost surely, 2^{1012889929940} is an apocalyptic number.

1012889929940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012889929940 is an abundant number, since it is smaller than the sum of its proper divisors (1461455472736).

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

1012889929940 is a wasteful number, since it uses less digits than its factorization.

1012889929940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033561176 (or 1033561167 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 62.

The spelling of 1012889929940 in words is "one trillion, twelve billion, eight hundred eighty-nine million, nine hundred twenty-nine thousand, nine hundred forty".