1322402420 has 24 divisors (see below), whose sum is σ = 2780321544. Its totient is φ = 528336896.

The previous prime is 1322402399. The next prime is 1322402429. The reversal of 1322402420 is 242042231.

It can be written as a sum of positive squares in 4 ways, for example, as 554225764 + 768176656 = 23542^2 + 27716^2 .

It is a super-3 number, since 3×1322402420³ (a number of 28 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1322402392 and 1322402401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1322402429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21437 + ... + 55716.

It is an arithmetic number, because the mean of its divisors is an integer number (115846731).

Almost surely, 2^1322402420 is an apocalyptic number.

1322402420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1322402420 is an abundant number, since it is smaller than the sum of its proper divisors (1457919124).

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

1322402420 is a wasteful number, since it uses less digits than its factorization.

1322402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78019 (or 78017 counting only the distinct ones).

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

The square root of 1322402420 is about 36364.8514365177. The cubic root of 1322402420 is about 1097.6264025589.

Adding to 1322402420 its reverse (242042231), we get a palindrome (1564444651).

The spelling of 1322402420 in words is "one billion, three hundred twenty-two million, four hundred two thousand, four hundred twenty".