2621880 has 48 divisors (see below), whose sum is σ = 8522280. Its totient is φ = 699072.

The previous prime is 2621863. The next prime is 2621881. The reversal of 2621880 is 881262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2621881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3282 + ... + 4001.

2^2621880 is an apocalyptic number.

2621880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2621880 is an abundant number, since it is smaller than the sum of its proper divisors (5900400).

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

2621880 is a wasteful number, since it uses less digits than its factorization.

2621880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7300 (or 7293 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 2621880 is about 1619.2220354232. Note that the first 3 decimals coincide. The cubic root of 2621880 is about 137.8915341776.

The spelling of 2621880 in words is "two million, six hundred twenty-one thousand, eight hundred eighty".