1823820402 has 16 divisors (see below), whose sum is σ = 3648214080. Its totient is φ = 607844592.

The previous prime is 1823820359. The next prime is 1823820403. The reversal of 1823820402 is 2040283281.

It is a self number, because there is not a number n which added to its sum of digits gives 1823820402.

It is not an unprimeable number, because it can be changed into a prime (1823820403) 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, 25248 + ... + 65460.

It is an arithmetic number, because the mean of its divisors is an integer number (228013380).

Almost surely, 2^1823820402 is an apocalyptic number.

1823820402 is an abundant number, since it is smaller than the sum of its proper divisors (1824393678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1823820402 is a wasteful number, since it uses less digits than its factorization.

1823820402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47777.

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 1823820402 is about 42706.2103446325. The cubic root of 1823820402 is about 1221.7828457584.

The spelling of 1823820402 in words is "one billion, eight hundred twenty-three million, eight hundred twenty thousand, four hundred two".