3897844956 has 24 divisors (see below), whose sum is σ = 10105524240. Its totient is φ = 1299281616.

The previous prime is 3897844933. The next prime is 3897844967. The reversal of 3897844956 is 6594487983.

It is a junction number, because it is equal to n+sod(n) for n = 3897844893 and 3897844902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18045471 + ... + 18045686.

It is an arithmetic number, because the mean of its divisors is an integer number (421063510).

Almost surely, 2^3897844956 is an apocalyptic number.

3897844956 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3897844956 is an abundant number, since it is smaller than the sum of its proper divisors (6207679284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3897844956 is a wasteful number, since it uses less digits than its factorization.

3897844956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36091170 (or 36091162 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The square root of 3897844956 is about 62432.7234389146. The cubic root of 3897844956 is about 1573.7709341070.

The spelling of 3897844956 in words is "three billion, eight hundred ninety-seven million, eight hundred forty-four thousand, nine hundred fifty-six".