1594401440 has 216 divisors, whose sum is σ = 4245194772. Its totient is φ = 565411840.

The previous prime is 1594401439. The next prime is 1594401443. The reversal of 1594401440 is 441044951.

It can be written as a sum of positive squares in 18 ways, for example, as 1752976 + 1592648464 = 1324^2 + 39908^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1594401397 and 1594401406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1594401443) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38887820 + ... + 38887860.

Almost surely, 2^1594401440 is an apocalyptic number.

1594401440 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 1594401440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2122597386).

1594401440 is an abundant number, since it is smaller than the sum of its proper divisors (2650793332).

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

1594401440 is a wasteful number, since it uses less digits than its factorization.

1594401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1594401440 is about 39929.9566741563. The cubic root of 1594401440 is about 1168.2413103092.

The spelling of 1594401440 in words is "one billion, five hundred ninety-four million, four hundred one thousand, four hundred forty".