1440401856 has 224 divisors, whose sum is σ = 4244766720. Its totient is φ = 429235200.

The previous prime is 1440401849. The next prime is 1440401863. The reversal of 1440401856 is 6581040441.

It is an interprime number because it is at equal distance from previous prime (1440401849) and next prime (1440401863).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5315001 + ... + 5315271.

Almost surely, 2^1440401856 is an apocalyptic number.

1440401856 is a gapful number since it is divisible by the number (16) 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 1440401856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122383360).

1440401856 is an abundant number, since it is smaller than the sum of its proper divisors (2804364864).

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

1440401856 is a wasteful number, since it uses less digits than its factorization.

1440401856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 1440401856 is about 37952.6264703775. The cubic root of 1440401856 is about 1129.3482696024.

The spelling of 1440401856 in words is "one billion, four hundred forty million, four hundred one thousand, eight hundred fifty-six".