3891742 has 16 divisors (see below), whose sum is σ = 6395760. Its totient is φ = 1767808.

The previous prime is 3891733. The next prime is 3891743. The reversal of 3891742 is 2471983.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 3891698 and 3891707.

It is a congruent 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 in 7 ways as a sum of consecutive naturals, for example, 988 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (399735).

Almost surely, 2^3891742 is an apocalyptic number.

3891742 is a deficient number, since it is larger than the sum of its proper divisors (2504018).

3891742 is a wasteful number, since it uses less digits than its factorization.

3891742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995.

The product of its digits is 12096, while the sum is 34.

The square root of 3891742 is about 1972.7498574325. The cubic root of 3891742 is about 157.2949140527.

The spelling of 3891742 in words is "three million, eight hundred ninety-one thousand, seven hundred forty-two".