2021878 has 8 divisors (see below), whose sum is σ = 3211272. Its totient is φ = 951456.

The previous prime is 2021863. The next prime is 2021879. The reversal of 2021878 is 8781202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29700 + ... + 29767.

It is an arithmetic number, because the mean of its divisors is an integer number (401409).

2^2021878 is an apocalyptic number.

2021878 is a deficient number, since it is larger than the sum of its proper divisors (1189394).

2021878 is a wasteful number, since it uses less digits than its factorization.

2021878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59486.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2021878 is about 1421.9275649624. The cubic root of 2021878 is about 126.4498491492.

It can be divided in two parts, 202 and 1878, that added together give a triangular number (2080 = T₆₄).

The spelling of 2021878 in words is "two million, twenty-one thousand, eight hundred seventy-eight".