2997820 has 96 divisors (see below), whose sum is σ = 8064000. Its totient is φ = 931392.

The previous prime is 2997811. The next prime is 2997821. The reversal of 2997820 is 287992.

It is a self number, because there is not a number n which added to its sum of digits gives 2997820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2997821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130329 + ... + 130351.

It is an arithmetic number, because the mean of its divisors is an integer number (84000).

2^2997820 is an apocalyptic number.

2997820 is a gapful number since it is divisible by the number (20) 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 2997820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4032000).

2997820 is an abundant number, since it is smaller than the sum of its proper divisors (5066180).

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

2997820 is a wasteful number, since it uses less digits than its factorization.

2997820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 2997820 is about 1731.4213814089. The cubic root of 2997820 is about 144.1900140758.

The spelling of 2997820 in words is "two million, nine hundred ninety-seven thousand, eight hundred twenty".