3971430 has 40 divisors (see below), whose sum is σ = 10680912. Its totient is φ = 1058832.

The previous prime is 3971423. The next prime is 3971431. The reversal of 3971430 is 341793.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3971394 and 3971403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1642 + ... + 3261.

Almost surely, 2^3971430 is an apocalyptic number.

3971430 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3971430 is an abundant number, since it is smaller than the sum of its proper divisors (6709482).

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

3971430 is a wasteful number, since it uses less digits than its factorization.

3971430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4922 (or 4913 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 3971430 is about 1992.8447004220. The cubic root of 3971430 is about 158.3612680783.

The spelling of 3971430 in words is "three million, nine hundred seventy-one thousand, four hundred thirty".