1022685440 has 144 divisors (see below), whose sum is σ = 2821308672. Its totient is φ = 347922432.

The previous prime is 1022685353. The next prime is 1022685449. The reversal of 1022685440 is 445862201.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1022685397 and 1022685406.

It is not an unprimeable number, because it can be changed into a prime (1022685449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1406357 + ... + 1407083.

Almost surely, 2^1022685440 is an apocalyptic number.

1022685440 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 1022685440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1410654336).

1022685440 is an abundant number, since it is smaller than the sum of its proper divisors (1798623232).

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

1022685440 is an equidigital number, since it uses as much as digits as its factorization.

1022685440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 1022685440 is about 31979.4534037091. The cubic root of 1022685440 is about 1007.5053422454.

The spelling of 1022685440 in words is "one billion, twenty-two million, six hundred eighty-five thousand, four hundred forty".