1022144640 has 128 divisors (see below), whose sum is σ = 3554349120. Its totient is φ = 247787520.

The previous prime is 1022144639. The next prime is 1022144663. The reversal of 1022144640 is 464412201.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1022144640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3079 + ... + 45318.

Almost surely, 2^1022144640 is an apocalyptic number.

1022144640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022144640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1777174560).

1022144640 is an abundant number, since it is smaller than the sum of its proper divisors (2532204480).

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

1022144640 is a wasteful number, since it uses less digits than its factorization.

1022144640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48430 (or 48418 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1022144640 is about 31970.9968565261. The cubic root of 1022144640 is about 1007.3277200307.

Adding to 1022144640 its reverse (464412201), we get a palindrome (1486556841).

The spelling of 1022144640 in words is "one billion, twenty-two million, one hundred forty-four thousand, six hundred forty".