1423400340 has 96 divisors (see below), whose sum is σ = 4123607040. Its totient is φ = 366480000.

The previous prime is 1423400273. The next prime is 1423400347. The reversal of 1423400340 is 430043241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423400347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1396351 + ... + 1397369.

It is an arithmetic number, because the mean of its divisors is an integer number (42954240).

Almost surely, 2^1423400340 is an apocalyptic number.

1423400340 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 1423400340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2061803520).

1423400340 is an abundant number, since it is smaller than the sum of its proper divisors (2700206700).

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

1423400340 is a wasteful number, since it uses less digits than its factorization.

1423400340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813 (or 1811 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1423400340 is about 37727.9782124619. The cubic root of 1423400340 is about 1124.8873210602.

Adding to 1423400340 its reverse (430043241), we get a palindrome (1853443581).

The spelling of 1423400340 in words is "one billion, four hundred twenty-three million, four hundred thousand, three hundred forty".