1423204340 has 24 divisors (see below), whose sum is σ = 3022314120. Its totient is φ = 562884608.

The previous prime is 1423204339. The next prime is 1423204357. The reversal of 1423204340 is 434023241.

It can be written as a sum of positive squares in 4 ways, for example, as 15904144 + 1407300196 = 3988^2 + 37514^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397997 + ... + 401556.

It is an arithmetic number, because the mean of its divisors is an integer number (125929755).

Almost surely, 2^1423204340 is an apocalyptic number.

1423204340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423204340 is an abundant number, since it is smaller than the sum of its proper divisors (1599109780).

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

1423204340 is a wasteful number, since it uses less digits than its factorization.

1423204340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799651 (or 799649 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1423204340 is about 37725.3805812480. The cubic root of 1423204340 is about 1124.8356869488.

Adding to 1423204340 its reverse (434023241), we get a palindrome (1857227581).

The spelling of 1423204340 in words is "one billion, four hundred twenty-three million, two hundred four thousand, three hundred forty".