3897945784 has 16 divisors (see below), whose sum is σ = 7309815120. Its totient is φ = 1948661760.

The previous prime is 3897945739. The next prime is 3897945787. The reversal of 3897945784 is 4875497983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897945787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19512 + ... + 90424.

It is an arithmetic number, because the mean of its divisors is an integer number (456863445).

Almost surely, 2^3897945784 is an apocalyptic number.

It is an amenable number.

3897945784 is a deficient number, since it is larger than the sum of its proper divisors (3411869336).

3897945784 is a wasteful number, since it uses less digits than its factorization.

3897945784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77790 (or 77786 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 64.

The square root of 3897945784 is about 62433.5309268986. The cubic root of 3897945784 is about 1573.7845038966.

The spelling of 3897945784 in words is "three billion, eight hundred ninety-seven million, nine hundred forty-five thousand, seven hundred eighty-four".