6181920 has 168 divisors, whose sum is σ = 22310316. Its totient is φ = 1617408.

The previous prime is 6181919. The next prime is 6181921. The reversal of 6181920 is 291816.

It is an interprime number because it is at equal distance from previous prime (6181919) and next prime (6181921).

It can be written as a sum of positive squares in 2 ways, for example, as 6170256 + 11664 = 2484^2 + 108^2 .

It is a super-2 number, since 2×6181920² = 76432269772800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (6181921) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 116614 + ... + 116666.

Almost surely, 2^6181920 is an apocalyptic number.

6181920 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 6181920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11155158).

6181920 is an abundant number, since it is smaller than the sum of its proper divisors (16128396).

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

6181920 is an equidigital number, since it uses as much as digits as its factorization.

6181920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 63 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 6181920 is about 2486.3467175758. The cubic root of 6181920 is about 183.5303080360.

The spelling of 6181920 in words is "six million, one hundred eighty-one thousand, nine hundred twenty".