3951424 has 28 divisors (see below), whose sum is σ = 8115300. Its totient is φ = 1906688.

The previous prime is 3951421. The next prime is 3951427. The reversal of 3951424 is 4241593.

It is an interprime number because it is at equal distance from previous prime (3951421) and next prime (3951427).

It can be written as a sum of positive squares in 2 ways, for example, as 1517824 + 2433600 = 1232^2 + 1560^2 .

It is a super-2 number, since 2×3951424² = 31227503255552, which contains 22 as substring.

Its product of digits (4320) is a multiple of the sum of its prime divisors (2160).

It is a junction number, because it is equal to n+sod(n) for n = 3951392 and 3951401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3951421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792 + ... + 2920.

Almost surely, 2^3951424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3951424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4057650).

3951424 is an abundant number, since it is smaller than the sum of its proper divisors (4163876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3951424 is a wasteful number, since it uses less digits than its factorization.

3951424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2170 (or 2160 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 3951424 is about 1987.8189052326. The cubic root of 3951424 is about 158.0949063948.

The spelling of 3951424 in words is "three million, nine hundred fifty-one thousand, four hundred twenty-four".