1423021140 has 72 divisors (see below), whose sum is σ = 4338297600. Its totient is φ = 377555904.

The previous prime is 1423021123. The next prime is 1423021163. The reversal of 1423021140 is 411203241.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15957 + ... + 55683.

Almost surely, 2^1423021140 is an apocalyptic number.

1423021140 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 1423021140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2169148800).

1423021140 is an abundant number, since it is smaller than the sum of its proper divisors (2915276460).

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

1423021140 is a wasteful number, since it uses less digits than its factorization.

1423021140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39941 (or 39936 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1423021140 is about 37722.9524295223. The cubic root of 1423021140 is about 1124.7874205744.

Adding to 1423021140 its reverse (411203241), we get a palindrome (1834224381).

The spelling of 1423021140 in words is "one billion, four hundred twenty-three million, twenty-one thousand, one hundred forty".