1423155444 has 12 divisors (see below), whose sum is σ = 3320696064. Its totient is φ = 474385144.

The previous prime is 1423155439. The next prime is 1423155451. The reversal of 1423155444 is 4445513241.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59298132 + ... + 59298155.

It is an arithmetic number, because the mean of its divisors is an integer number (276724672).

Almost surely, 2^1423155444 is an apocalyptic number.

It is an amenable number.

1423155444 is an abundant number, since it is smaller than the sum of its proper divisors (1897540620).

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

1423155444 is a wasteful number, since it uses less digits than its factorization.

1423155444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118596294 (or 118596292 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

The square root of 1423155444 is about 37724.7325239027. The cubic root of 1423155444 is about 1124.8228050798.

Adding to 1423155444 its reverse (4445513241), we get a palindrome (5868668685).

The spelling of 1423155444 in words is "one billion, four hundred twenty-three million, one hundred fifty-five thousand, four hundred forty-four".