3957447 has 32 divisors (see below), whose sum is σ = 6193152. Its totient is φ = 2225664.

The previous prime is 3957439. The next prime is 3957451. The reversal of 3957447 is 7447593.

It is not a de Polignac number, because 3957447 - 2³ = 3957439 is a prime.

It is a super-2 number, since 2×3957447² = 31322773515618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3957487) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31098 + ... + 31224.

It is an arithmetic number, because the mean of its divisors is an integer number (193536).

Almost surely, 2^3957447 is an apocalyptic number.

3957447 is a deficient number, since it is larger than the sum of its proper divisors (2235705).

3957447 is a wasteful number, since it uses less digits than its factorization.

3957447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207.

The product of its digits is 105840, while the sum is 39.

The square root of 3957447 is about 1989.3333054066. Note that the first 4 decimals coincide. The cubic root of 3957447 is about 158.1751915635.

It can be divided in two parts, 39574 and 47, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 3957447 in words is "three million, nine hundred fifty-seven thousand, four hundred forty-seven".