1423722240 has 216 divisors, whose sum is σ = 4988627280. Its totient is φ = 374833152.

The previous prime is 1423722211. The next prime is 1423722263. The reversal of 1423722240 is 422273241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 955416 + ... + 956904.

Almost surely, 2^1423722240 is an apocalyptic number.

1423722240 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 1423722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2494313640).

1423722240 is an abundant number, since it is smaller than the sum of its proper divisors (3564905040).

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

1423722240 is a wasteful number, since it uses less digits than its factorization.

1423722240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 1423722240 is about 37732.2440361026. The cubic root of 1423722240 is about 1124.9721119013.

Adding to 1423722240 its reverse (422273241), we get a palindrome (1845995481).

The spelling of 1423722240 in words is "one billion, four hundred twenty-three million, seven hundred twenty-two thousand, two hundred forty".