1423304440 has 32 divisors (see below), whose sum is σ = 3370986000. Its totient is φ = 539357184.

The previous prime is 1423304437. The next prime is 1423304479. The reversal of 1423304440 is 444033241.

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, 935625 + ... + 937144.

Almost surely, 2^1423304440 is an apocalyptic number.

1423304440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423304440 is an abundant number, since it is smaller than the sum of its proper divisors (1947681560).

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

1423304440 is a wasteful number, since it uses less digits than its factorization.

1423304440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872799 (or 1872795 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1423304440 is about 37726.7072509648. The cubic root of 1423304440 is about 1124.8620578194.

Adding to 1423304440 its reverse (444033241), we get a palindrome (1867337681).

The spelling of 1423304440 in words is "one billion, four hundred twenty-three million, three hundred four thousand, four hundred forty".