2821378 has 16 divisors (see below), whose sum is σ = 4875264. Its totient is φ = 1199520.

The previous prime is 2821369. The next prime is 2821393. The reversal of 2821378 is 8731282.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1183 + ... + 2653.

It is an arithmetic number, because the mean of its divisors is an integer number (304704).

2^2821378 is an apocalyptic number.

2821378 is a deficient number, since it is larger than the sum of its proper divisors (2053886).

2821378 is a wasteful number, since it uses less digits than its factorization.

2821378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617.

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

The square root of 2821378 is about 1679.6958057934. The cubic root of 2821378 is about 141.3037730888.

The spelling of 2821378 in words is "two million, eight hundred twenty-one thousand, three hundred seventy-eight".