2955820 has 48 divisors (see below), whose sum is σ = 7273728. Its totient is φ = 987840.

The previous prime is 2955817. The next prime is 2955829. The reversal of 2955820 is 285592.

It is a happy number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2955829) 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, 5775 + ... + 6265.

It is an arithmetic number, because the mean of its divisors is an integer number (151536).

2^2955820 is an apocalyptic number.

2955820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2955820 is the 860-th decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2955820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3636864).

2955820 is an abundant number, since it is smaller than the sum of its proper divisors (4317908).

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

2955820 is a wasteful number, since it uses less digits than its factorization.

2955820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2955820 is about 1719.2498364112. The cubic root of 2955820 is about 143.5134686092.

The spelling of 2955820 in words is "two million, nine hundred fifty-five thousand, eight hundred twenty".