1022423440 has 80 divisors (see below), whose sum is σ = 2543497920. Its totient is φ = 381058560.

The previous prime is 1022423419. The next prime is 1022423443. The reversal of 1022423440 is 443242201.

It is a happy number.

1022423440 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 (80).

It is a super-2 number, since 2×1022423440² = 2090699381322867200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1022423443) 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, 87207 + ... + 98233.

It is an arithmetic number, because the mean of its divisors is an integer number (31793724).

Almost surely, 2^1022423440 is an apocalyptic number.

1022423440 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 1022423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1271748960).

1022423440 is an abundant number, since it is smaller than the sum of its proper divisors (1521074480).

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

1022423440 is a wasteful number, since it uses less digits than its factorization.

1022423440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11120 (or 11114 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1022423440 is about 31975.3567611059. The cubic root of 1022423440 is about 1007.4192978847.

Adding to 1022423440 its reverse (443242201), we get a palindrome (1465665641).

The spelling of 1022423440 in words is "one billion, twenty-two million, four hundred twenty-three thousand, four hundred forty".