1422423640 has 64 divisors (see below), whose sum is σ = 3498888960. Its totient is φ = 516136320.

The previous prime is 1422423637. The next prime is 1422423647. The reversal of 1422423640 is 463242241.

It is a junction number, because it is equal to n+sod(n) for n = 1422423599 and 1422423608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422423647) 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, 218107 + ... + 224533.

It is an arithmetic number, because the mean of its divisors is an integer number (54670140).

Almost surely, 2^1422423640 is an apocalyptic number.

1422423640 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 1422423640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749444480).

1422423640 is an abundant number, since it is smaller than the sum of its proper divisors (2076465320).

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

1422423640 is a wasteful number, since it uses less digits than its factorization.

1422423640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6952 (or 6948 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 1422423640 is about 37715.0320164255. The cubic root of 1422423640 is about 1124.6299727922.

Adding to 1422423640 its reverse (463242241), we get a palindrome (1885665881).

The spelling of 1422423640 in words is "one billion, four hundred twenty-two million, four hundred twenty-three thousand, six hundred forty".