1022573440 has 256 divisors, whose sum is σ = 2976768000. Its totient is φ = 328458240.

The previous prime is 1022573429. The next prime is 1022573449. The reversal of 1022573440 is 443752201.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1022573399 and 1022573408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022573449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5138461 + ... + 5138659.

It is an arithmetic number, because the mean of its divisors is an integer number (11628000).

Almost surely, 2^1022573440 is an apocalyptic number.

1022573440 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 1022573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1488384000).

1022573440 is an abundant number, since it is smaller than the sum of its proper divisors (1954194560).

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

1022573440 is a wasteful number, since it uses less digits than its factorization.

1022573440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 1022573440 is about 31977.7022313987. The cubic root of 1022573440 is about 1007.4685617218.

The spelling of 1022573440 in words is "one billion, twenty-two million, five hundred seventy-three thousand, four hundred forty".