3891746 has 4 divisors (see below), whose sum is σ = 5837622. Its totient is φ = 1945872.

The previous prime is 3891743. The next prime is 3891749. The reversal of 3891746 is 6471983.

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

It is an interprime number because it is at equal distance from previous prime (3891743) and next prime (3891749).

It can be written as a sum of positive squares in only one way, i.e., 3845521 + 46225 = 1961^2 + 215^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3891743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972935 + ... + 972938.

Almost surely, 2^3891746 is an apocalyptic number.

3891746 is a deficient number, since it is larger than the sum of its proper divisors (1945876).

3891746 is a wasteful number, since it uses less digits than its factorization.

3891746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945875.

The product of its digits is 36288, while the sum is 38.

The square root of 3891746 is about 1972.7508712455. The cubic root of 3891746 is about 157.2949679428.

The spelling of 3891746 in words is "three million, eight hundred ninety-one thousand, seven hundred forty-six".