1423296840 has 256 divisors, whose sum is σ = 5171558400. Its totient is φ = 306118656.

The previous prime is 1423296803. The next prime is 1423296881. The reversal of 1423296840 is 486923241.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4101547 + ... + 4101893.

It is an arithmetic number, because the mean of its divisors is an integer number (20201400).

Almost surely, 2^1423296840 is an apocalyptic number.

1423296840 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 1423296840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2585779200).

1423296840 is an abundant number, since it is smaller than the sum of its proper divisors (3748261560).

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

1423296840 is a wasteful number, since it uses less digits than its factorization.

1423296840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 1423296840 is about 37726.6065264291. The cubic root of 1423296840 is about 1124.8600556788.

The spelling of 1423296840 in words is "one billion, four hundred twenty-three million, two hundred ninety-six thousand, eight hundred forty".