2797920 has 144 divisors (see below), whose sum is σ = 10024560. Its totient is φ = 709632.

The previous prime is 2797919. The next prime is 2797939. The reversal of 2797920 is 297972.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41727 + ... + 41793.

It is an arithmetic number, because the mean of its divisors is an integer number (69615).

2^2797920 is an apocalyptic number.

2797920 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 2797920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5012280).

2797920 is an abundant number, since it is smaller than the sum of its proper divisors (7226640).

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

2797920 is a wasteful number, since it uses less digits than its factorization.

2797920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 2797920 is about 1672.6984187235. The cubic root of 2797920 is about 140.9110650876.

The spelling of 2797920 in words is "two million, seven hundred ninety-seven thousand, nine hundred twenty".