3967858 has 4 divisors (see below), whose sum is σ = 5951790. Its totient is φ = 1983928.

The previous prime is 3967841. The next prime is 3967871. The reversal of 3967858 is 8587693.

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

It can be written as a sum of positive squares in only one way, i.e., 3052009 + 915849 = 1747^2 + 957^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991963 + ... + 991966.

Almost surely, 2^3967858 is an apocalyptic number.

3967858 is a deficient number, since it is larger than the sum of its proper divisors (1983932).

3967858 is a wasteful number, since it uses less digits than its factorization.

3967858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983931.

The product of its digits is 362880, while the sum is 46.

The square root of 3967858 is about 1991.9482925016. The cubic root of 3967858 is about 158.3137758546.

It can be divided in two parts, 39 and 67858, that multiplied together give a palindrome (2646462).

The spelling of 3967858 in words is "three million, nine hundred sixty-seven thousand, eight hundred fifty-eight".