1021938144 has 48 divisors (see below), whose sum is σ = 2686032720. Its totient is φ = 340208640.

The previous prime is 1021938143. The next prime is 1021938149. The reversal of 1021938144 is 4418391201.

It is a happy number.

1021938144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021938143) 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, 73164 + ... + 86004.

It is an arithmetic number, because the mean of its divisors is an integer number (55959015).

Almost surely, 2^1021938144 is an apocalyptic number.

It is an amenable number.

1021938144 is an abundant number, since it is smaller than the sum of its proper divisors (1664094576).

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

1021938144 is a wasteful number, since it uses less digits than its factorization.

1021938144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13683 (or 13675 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1021938144 is about 31967.7672664201. The cubic root of 1021938144 is about 1007.2598812448.

The spelling of 1021938144 in words is "one billion, twenty-one million, nine hundred thirty-eight thousand, one hundred forty-four".