3940434 has 32 divisors (see below), whose sum is σ = 8965440. Its totient is φ = 1282176.

The previous prime is 3940427. The next prime is 3940439. The reversal of 3940434 is 4340493.

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

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3940398 and 3940407.

It is not an unprimeable number, because it can be changed into a prime (3940439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474 + ... + 3170.

It is an arithmetic number, because the mean of its divisors is an integer number (280170).

Almost surely, 2^3940434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3940434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4482720).

3940434 is an abundant number, since it is smaller than the sum of its proper divisors (5025006).

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

3940434 is a wasteful number, since it uses less digits than its factorization.

3940434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751 (or 1745 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 3940434 is about 1985.0526441382. The cubic root of 3940434 is about 157.9482017889.

The spelling of 3940434 in words is "three million, nine hundred forty thousand, four hundred thirty-four".