3899550240 has 144 divisors (see below), whose sum is σ = 13412625408. Its totient is φ = 1031643648.

The previous prime is 3899550217. The next prime is 3899550241. The reversal of 3899550240 is 420559983.

3899550240 is a `hidden beast` number, since 3 + 8 + 99 + 550 + 2 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is not an unprimeable number, because it can be changed into a prime (3899550241) 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, 172219 + ... + 193541.

It is an arithmetic number, because the mean of its divisors is an integer number (93143232).

Almost surely, 2^3899550240 is an apocalyptic number.

3899550240 is a gapful number since it is divisible by the number (30) 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 3899550240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6706312704).

3899550240 is an abundant number, since it is smaller than the sum of its proper divisors (9513075168).

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

3899550240 is a wasteful number, since it uses less digits than its factorization.

3899550240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21471 (or 21460 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 3899550240 is about 62446.3789182367. The cubic root of 3899550240 is about 1574.0004057892. Note that the first 3 decimals are identical.

The spelling of 3899550240 in words is "three billion, eight hundred ninety-nine million, five hundred fifty thousand, two hundred forty".