4445187840 has 216 divisors, whose sum is σ = 15568534800. Its totient is φ = 1170849792.

The previous prime is 4445187839. The next prime is 4445187911. The reversal of 4445187840 is 487815444.

4445187840 is a `hidden beast` number, since 44 + 451 + 87 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 953836 + ... + 958484.

It is an arithmetic number, because the mean of its divisors is an integer number (72076550).

Almost surely, 2^4445187840 is an apocalyptic number.

4445187840 is a gapful number since it is divisible by the number (40) 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 4445187840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7784267400).

4445187840 is an abundant number, since it is smaller than the sum of its proper divisors (11123346960).

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

4445187840 is a wasteful number, since it uses less digits than its factorization.

4445187840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759 (or 4742 counting only the distinct ones).

The product of its (nonzero) digits is 573440, while the sum is 45.

The square root of 4445187840 is about 66672.2419002091. The cubic root of 4445187840 is about 1644.2330463313.

The spelling of 4445187840 in words is "four billion, four hundred forty-five million, one hundred eighty-seven thousand, eight hundred forty".