3891565052 has 6 divisors (see below), whose sum is σ = 6810238848. Its totient is φ = 1945782524.

The previous prime is 3891565037. The next prime is 3891565133. The reversal of 3891565052 is 2505651983.

It is a junction number, because it is equal to n+sod(n) for n = 3891564994 and 3891565012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486445628 + ... + 486445635.

It is an arithmetic number, because the mean of its divisors is an integer number (1135039808).

Almost surely, 2^3891565052 is an apocalyptic number.

It is an amenable number.

3891565052 is a deficient number, since it is larger than the sum of its proper divisors (2918673796).

3891565052 is a wasteful number, since it uses less digits than its factorization.

3891565052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972891267 (or 972891265 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 3891565052 is about 62382.4097963520. The cubic root of 3891565052 is about 1572.9253007810.

The spelling of 3891565052 in words is "three billion, eight hundred ninety-one million, five hundred sixty-five thousand, fifty-two".