2378821 has 8 divisors (see below), whose sum is σ = 2525760. Its totient is φ = 2235552.

The previous prime is 2378807. The next prime is 2378843. The reversal of 2378821 is 1288732.

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

It is a cyclic number.

It is not a de Polignac number, because 2378821 - 2¹³ = 2370629 is a prime.

It is a Duffinian number.

2378821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2378801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481 + ... + 2233.

It is an arithmetic number, because the mean of its divisors is an integer number (315720).

2^2378821 is an apocalyptic number.

It is an amenable number.

2378821 is a deficient number, since it is larger than the sum of its proper divisors (146939).

2378821 is a wasteful number, since it uses less digits than its factorization.

2378821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835.

The product of its digits is 5376, while the sum is 31.

The square root of 2378821 is about 1542.3426986244. The cubic root of 2378821 is about 133.4915947146.

The spelling of 2378821 in words is "two million, three hundred seventy-eight thousand, eight hundred twenty-one".