3784521385 has 16 divisors (see below), whose sum is σ = 4963686912. Its totient is φ = 2757600000.

The previous prime is 3784521371. The next prime is 3784521421. The reversal of 3784521385 is 5831254873.

3784521385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3784521385 - 2⁵ = 3784521353 is a prime.

It is a super-2 number, since 2×3784521385² = 28645204227044636450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715491 + ... + 720760.

It is an arithmetic number, because the mean of its divisors is an integer number (310230432).

Almost surely, 2^3784521385 is an apocalyptic number.

It is an amenable number.

3784521385 is a deficient number, since it is larger than the sum of its proper divisors (1179165527).

3784521385 is a wasteful number, since it uses less digits than its factorization.

3784521385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436304.

The product of its digits is 806400, while the sum is 46.

The square root of 3784521385 is about 61518.4637730820. The cubic root of 3784521385 is about 1558.3690747488.

The spelling of 3784521385 in words is "three billion, seven hundred eighty-four million, five hundred twenty-one thousand, three hundred eighty-five".