1023222440 has 16 divisors (see below), whose sum is σ = 2302250580. Its totient is φ = 409288960.

The previous prime is 1023222439. The next prime is 1023222461. The reversal of 1023222440 is 442223201.

It can be written as a sum of positive squares in 2 ways, for example, as 986085604 + 37136836 = 31402^2 + 6094^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12790241 + ... + 12790320.

Almost surely, 2^1023222440 is an apocalyptic number.

1023222440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023222440 is an abundant number, since it is smaller than the sum of its proper divisors (1279028140).

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

1023222440 is a wasteful number, since it uses less digits than its factorization.

1023222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25580572 (or 25580568 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1023222440 is about 31987.8483177597. The cubic root of 1023222440 is about 1007.6816544261.

Adding to 1023222440 its reverse (442223201), we get a palindrome (1465445641).

The spelling of 1023222440 in words is "one billion, twenty-three million, two hundred twenty-two thousand, four hundred forty".