1423989406 has 16 divisors (see below), whose sum is σ = 2442211200. Its totient is φ = 610009560.

The previous prime is 1423989403. The next prime is 1423989421. The reversal of 1423989406 is 6049893241.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423989401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11745 + ... + 54643.

It is an arithmetic number, because the mean of its divisors is an integer number (152638200).

Almost surely, 2^1423989406 is an apocalyptic number.

1423989406 is a deficient number, since it is larger than the sum of its proper divisors (1018221794).

1423989406 is a wasteful number, since it uses less digits than its factorization.

1423989406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45279.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 1423989406 is about 37735.7841577461. The cubic root of 1423989406 is about 1125.0424756967.

The spelling of 1423989406 in words is "one billion, four hundred twenty-three million, nine hundred eighty-nine thousand, four hundred six".