1022400452 has 36 divisors (see below), whose sum is σ = 1868096580. Its totient is φ = 489025152.

The previous prime is 1022400433. The next prime is 1022400487. The reversal of 1022400452 is 2540042201.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 111809476 + 910590976 = 10574^2 + 30176^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2575118 + ... + 2575514.

Almost surely, 2^1022400452 is an apocalyptic number.

It is an amenable number.

1022400452 is a deficient number, since it is larger than the sum of its proper divisors (845696128).

1022400452 is a wasteful number, since it uses less digits than its factorization.

1022400452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1022400452 is about 31974.9972947614. The cubic root of 1022400452 is about 1007.4117476117.

Adding to 1022400452 its reverse (2540042201), we get a palindrome (3562442653).

The spelling of 1022400452 in words is "one billion, twenty-two million, four hundred thousand, four hundred fifty-two".