3161890 has 8 divisors (see below), whose sum is σ = 5691420. Its totient is φ = 1264752.

The previous prime is 3161887. The next prime is 3161891. The reversal of 3161890 is 981613.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3122289 + 39601 = 1767^2 + 199^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3161891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158085 + ... + 158104.

Almost surely, 2^3161890 is an apocalyptic number.

3161890 is a deficient number, since it is larger than the sum of its proper divisors (2529530).

3161890 is a wasteful number, since it uses less digits than its factorization.

3161890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316196.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 3161890 is about 1778.1704080318. The cubic root of 3161890 is about 146.7739286534.

The spelling of 3161890 in words is "three million, one hundred sixty-one thousand, eight hundred ninety".