1022320402 has 4 divisors (see below), whose sum is σ = 1533480606. Its totient is φ = 511160200.

The previous prime is 1022320367. The next prime is 1022320417. The reversal of 1022320402 is 2040232201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1022144841 + 175561 = 31971^2 + 419^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255580099 + ... + 255580102.

Almost surely, 2^1022320402 is an apocalyptic number.

1022320402 is a deficient number, since it is larger than the sum of its proper divisors (511160204).

1022320402 is an equidigital number, since it uses as much as digits as its factorization.

1022320402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511160203.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 1022320402 is about 31973.7455109657. The cubic root of 1022320402 is about 1007.3854547780.

Adding to 1022320402 its reverse (2040232201), we get a palindrome (3062552603).

It can be divided in two parts, 10223 and 20402, that added together give a square (30625 = 175²).

The spelling of 1022320402 in words is "one billion, twenty-two million, three hundred twenty thousand, four hundred two".