3985755477 has 32 divisors (see below), whose sum is σ = 5988885120. Its totient is φ = 2336613120.

The previous prime is 3985755461. The next prime is 3985755503. The reversal of 3985755477 is 7745575893.

It is a happy number.

It is not a de Polignac number, because 3985755477 - 2⁴ = 3985755461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3985755477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985755407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201799 + ... + 220667.

It is an arithmetic number, because the mean of its divisors is an integer number (187152660).

Almost surely, 2^3985755477 is an apocalyptic number.

3985755477 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

3985755477 is a deficient number, since it is larger than the sum of its proper divisors (2003129643).

3985755477 is a wasteful number, since it uses less digits than its factorization.

3985755477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19093.

The product of its digits is 37044000, while the sum is 60.

The square root of 3985755477 is about 63132.8399250343. The cubic root of 3985755477 is about 1585.5144965364.

The spelling of 3985755477 in words is "three billion, nine hundred eighty-five million, seven hundred fifty-five thousand, four hundred seventy-seven".