6161890 has 64 divisors (see below), whose sum is σ = 13789440. Its totient is φ = 1935360.

The previous prime is 6161873. The next prime is 6161899. The reversal of 6161890 is 981616.

It is a happy number.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (6161899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54474 + ... + 54586.

It is an arithmetic number, because the mean of its divisors is an integer number (215460).

Almost surely, 2^6161890 is an apocalyptic number.

6161890 is an abundant number, since it is smaller than the sum of its proper divisors (7627550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6161890 is a wasteful number, since it uses less digits than its factorization.

6161890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 6161890 is about 2482.3154513478. The cubic root of 6161890 is about 183.3318751032.

The spelling of 6161890 in words is "six million, one hundred sixty-one thousand, eight hundred ninety".