Cookie Consent by
Search a number
3970889 = 13476797

3970889 has 16 divisors (see below), whose sum is σ = 4478208. Its totient is φ = 3497472.

The previous prime is 3970859. The next prime is 3970903. The reversal of 3970889 is 9880793.

It is a cyclic number.

It is not a de Polignac number, because 3970889 - 28 = 3970633 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3970819) 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, 40889 + ... + 40985.

It is an arithmetic number, because the mean of its divisors is an integer number (279888).

Almost surely, 23970889 is an apocalyptic number.

It is an amenable number.

3970889 is a deficient number, since it is larger than the sum of its proper divisors (507319).

3970889 is a wasteful number, since it uses less digits than its factorization.

With its successor (3970890) it forms an eRAP, since the sums of their prime factors are consecutive (224 and 225).

3970889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3970889 is about 1992.7089601846. The cubic root of 3970889 is about 158.3540769375.

The spelling of 3970889 in words is "three million, nine hundred seventy thousand, eight hundred eighty-nine".

Divisors: 1 13 47 67 97 611 871 1261 3149 4559 6499 40937 59267 84487 305453 3970889