2820388 has 6 divisors (see below), whose sum is σ = 4935686. Its totient is φ = 1410192.

The previous prime is 2820383. The next prime is 2820401. The reversal of 2820388 is 8830282.

It can be written as a sum of positive squares in only one way, i.e., 1493284 + 1327104 = 1222^2 + 1152^2 .

It is not an unprimeable number, because it can be changed into a prime (2820383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 352545 + ... + 352552.

2^2820388 is an apocalyptic number.

It is an amenable number.

2820388 is a deficient number, since it is larger than the sum of its proper divisors (2115298).

2820388 is a wasteful number, since it uses less digits than its factorization.

2820388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705101 (or 705099 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 2820388 is about 1679.4010837200. The cubic root of 2820388 is about 141.2872436836.

The spelling of 2820388 in words is "two million, eight hundred twenty thousand, three hundred eighty-eight".