1599044440 has 96 divisors (see below), whose sum is σ = 4282811280. Its totient is φ = 535465728.

The previous prime is 1599044437. The next prime is 1599044441. The reversal of 1599044440 is 444409951.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1599044393 and 1599044402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1599044441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74794 + ... + 93766.

Almost surely, 2^1599044440 is an apocalyptic number.

1599044440 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 1599044440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2141405640).

1599044440 is an abundant number, since it is smaller than the sum of its proper divisors (2683766840).

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

1599044440 is a wasteful number, since it uses less digits than its factorization.

1599044440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19041 (or 19030 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1599044440 is about 39988.0537160788. The cubic root of 1599044440 is about 1169.3742093847.

The spelling of 1599044440 in words is "one billion, five hundred ninety-nine million, forty-four thousand, four hundred forty".