3954921886 has 4 divisors (see below), whose sum is σ = 5932382832. Its totient is φ = 1977460942.

The previous prime is 3954921853. The next prime is 3954921907. The reversal of 3954921886 is 6881294593.

It is a semiprime because it is the product of two primes.

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, 988730470 + ... + 988730473.

It is an arithmetic number, because the mean of its divisors is an integer number (1483095708).

Almost surely, 2^3954921886 is an apocalyptic number.

3954921886 is a deficient number, since it is larger than the sum of its proper divisors (1977460946).

3954921886 is a wasteful number, since it uses less digits than its factorization.

3954921886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977460945.

The product of its digits is 3732480, while the sum is 55.

The square root of 3954921886 is about 62888.1696823814. The cubic root of 3954921886 is about 1581.4154231348.

The spelling of 3954921886 in words is "three billion, nine hundred fifty-four million, nine hundred twenty-one thousand, eight hundred eighty-six".