1820938 has 24 divisors (see below), whose sum is σ = 3367332. Its totient is φ = 733824.

The previous prime is 1820927. The next prime is 1820947. The reversal of 1820938 is 8390281.

It can be written as a sum of positive squares in 2 ways, for example, as 1432809 + 388129 = 1197^2 + 623^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1120 + ... + 2212.

2^1820938 is an apocalyptic number.

1820938 is a deficient number, since it is larger than the sum of its proper divisors (1546394).

1820938 is a wasteful number, since it uses less digits than its factorization.

1820938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1820938 is about 1349.4213574714. The cubic root of 1820938 is about 122.1138863090.

The spelling of 1820938 in words is "one million, eight hundred twenty thousand, nine hundred thirty-eight".