3885891840 has 288 divisors, whose sum is σ = 13877942400. Its totient is φ = 1029611520.

The previous prime is 3885891817. The next prime is 3885891851. The reversal of 3885891840 is 481985883.

3885891840 is a `hidden beast` number, since 3 + 8 + 8 + 589 + 18 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 7913995 + ... + 7914485.

It is an arithmetic number, because the mean of its divisors is an integer number (48187300).

Almost surely, 2^3885891840 is an apocalyptic number.

3885891840 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 3885891840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6938971200).

3885891840 is an abundant number, since it is smaller than the sum of its proper divisors (9992050560).

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

3885891840 is a wasteful number, since it uses less digits than its factorization.

3885891840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The square root of 3885891840 is about 62336.9219644345. The cubic root of 3885891840 is about 1572.1605802979.

The spelling of 3885891840 in words is "three billion, eight hundred eighty-five million, eight hundred ninety-one thousand, eight hundred forty".