1423278720 has 192 divisors, whose sum is σ = 4964544000. Its totient is φ = 375699456.

The previous prime is 1423278719. The next prime is 1423278751. The reversal of 1423278720 is 278723241.

1423278720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 592081 + ... + 594479.

It is an arithmetic number, because the mean of its divisors is an integer number (25857000).

Almost surely, 2^1423278720 is an apocalyptic number.

1423278720 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 1423278720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482272000).

1423278720 is an abundant number, since it is smaller than the sum of its proper divisors (3541265280).

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

1423278720 is a wasteful number, since it uses less digits than its factorization.

1423278720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527 (or 2512 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 1423278720 is about 37726.3663768458. The cubic root of 1423278720 is about 1124.8552821253.

The spelling of 1423278720 in words is "one billion, four hundred twenty-three million, two hundred seventy-eight thousand, seven hundred twenty".