3870505765 has 16 divisors (see below), whose sum is σ = 5327298432. Its totient is φ = 2644473024.

The previous prime is 3870505747. The next prime is 3870505831. The reversal of 3870505765 is 5675050783.

It is a cyclic number.

It is not a de Polignac number, because 3870505765 - 2¹⁹ = 3869981477 is a prime.

It is a Duffinian number.

It is a congruent 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, 189919 + ... + 209308.

It is an arithmetic number, because the mean of its divisors is an integer number (332956152).

Almost surely, 2^3870505765 is an apocalyptic number.

3870505765 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3870505765 is a deficient number, since it is larger than the sum of its proper divisors (1456792667).

3870505765 is a wasteful number, since it uses less digits than its factorization.

3870505765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399516.

The product of its (nonzero) digits is 882000, while the sum is 46.

The square root of 3870505765 is about 62213.3889528613. The cubic root of 3870505765 is about 1570.0828610573.

The spelling of 3870505765 in words is "three billion, eight hundred seventy million, five hundred five thousand, seven hundred sixty-five".