1423256420 has 24 divisors (see below), whose sum is σ = 2989561344. Its totient is φ = 569164896.

The previous prime is 1423256377. The next prime is 1423256449. The reversal of 1423256420 is 246523241.

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, 132989 + ... + 143291.

It is an arithmetic number, because the mean of its divisors is an integer number (124565056).

Almost surely, 2^1423256420 is an apocalyptic number.

1423256420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1423256420 is an abundant number, since it is smaller than the sum of its proper divisors (1566304924).

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

1423256420 is a wasteful number, since it uses less digits than its factorization.

1423256420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17219 (or 17217 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1423256420 is about 37726.0708264192. The cubic root of 1423256420 is about 1124.8494073323.

Adding to 1423256420 its reverse (246523241), we get a palindrome (1669779661).

The spelling of 1423256420 in words is "one billion, four hundred twenty-three million, two hundred fifty-six thousand, four hundred twenty".