3985429 has 16 divisors (see below), whose sum is σ = 4883328. Its totient is φ = 3174912.

The previous prime is 3985409. The next prime is 3985433. The reversal of 3985429 is 9245893.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3985429 - 2⁹ = 3984917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3985391 and 3985400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985409) 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, 12577 + ... + 12889.

It is an arithmetic number, because the mean of its divisors is an integer number (305208).

Almost surely, 2^3985429 is an apocalyptic number.

It is an amenable number.

3985429 is a deficient number, since it is larger than the sum of its proper divisors (897899).

3985429 is a wasteful number, since it uses less digits than its factorization.

3985429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444.

The product of its digits is 77760, while the sum is 40.

The square root of 3985429 is about 1996.3539265371. The cubic root of 3985429 is about 158.5471205024.

The spelling of 3985429 in words is "three million, nine hundred eighty-five thousand, four hundred twenty-nine".