3990629 has 8 divisors (see below), whose sum is σ = 4105728. Its totient is φ = 3876880.

The previous prime is 3990619. The next prime is 3990641. The reversal of 3990629 is 9260993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3990629 - 2⁸ = 3990373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3990592 and 3990601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9044 + ... + 9474.

It is an arithmetic number, because the mean of its divisors is an integer number (513216).

Almost surely, 2^3990629 is an apocalyptic number.

It is an amenable number.

3990629 is a deficient number, since it is larger than the sum of its proper divisors (115099).

3990629 is a wasteful number, since it uses less digits than its factorization.

3990629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 3990629 is about 1997.6558762710. The cubic root of 3990629 is about 158.6160454722.

The spelling of 3990629 in words is "three million, nine hundred ninety thousand, six hundred twenty-nine".