3978629 has 8 divisors (see below), whose sum is σ = 4235328. Its totient is φ = 3724480.

The previous prime is 3978593. The next prime is 3978641. The reversal of 3978629 is 9268793.

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 3978629 - 2¹⁶ = 3913093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3978629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978659) 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, 3344 + ... + 4374.

It is an arithmetic number, because the mean of its divisors is an integer number (529416).

Almost surely, 2^3978629 is an apocalyptic number.

It is an amenable number.

3978629 is a deficient number, since it is larger than the sum of its proper divisors (256699).

3978629 is a wasteful number, since it uses less digits than its factorization.

3978629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275.

The product of its digits is 163296, while the sum is 44.

The square root of 3978629 is about 1994.6500946281. The cubic root of 3978629 is about 158.4568973278.

The spelling of 3978629 in words is "three million, nine hundred seventy-eight thousand, six hundred twenty-nine".