6161820 has 96 divisors (see below), whose sum is σ = 20901888. Its totient is φ = 1324032.

The previous prime is 6161819. The next prime is 6161873. The reversal of 6161820 is 281616.

It is a congruent number.

It is an unprimeable number.

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, 6709 + ... + 7571.

It is an arithmetic number, because the mean of its divisors is an integer number (217728).

Almost surely, 2^6161820 is an apocalyptic number.

6161820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6161820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10450944).

6161820 is an abundant number, since it is smaller than the sum of its proper divisors (14740068).

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

6161820 is a wasteful number, since it uses less digits than its factorization.

6161820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 6161820 is about 2482.3013515687. The cubic root of 6161820 is about 183.3311808746.

The spelling of 6161820 in words is "six million, one hundred sixty-one thousand, eight hundred twenty".