3891662 has 4 divisors (see below), whose sum is σ = 5837496. Its totient is φ = 1945830.

The previous prime is 3891659. The next prime is 3891673. The reversal of 3891662 is 2661983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2661983 = 421 ⋅6323.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972914 + ... + 972917.

It is an arithmetic number, because the mean of its divisors is an integer number (1459374).

Almost surely, 2^3891662 is an apocalyptic number.

3891662 is a deficient number, since it is larger than the sum of its proper divisors (1945834).

3891662 is a wasteful number, since it uses less digits than its factorization.

3891662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945833.

The product of its digits is 15552, while the sum is 35.

The square root of 3891662 is about 1972.7295810627. The cubic root of 3891662 is about 157.2938362424.

The spelling of 3891662 in words is "three million, eight hundred ninety-one thousand, six hundred sixty-two".