1818845400 has 96 divisors (see below), whose sum is σ = 5706509760. Its totient is φ = 479168640.

The previous prime is 1818845389. The next prime is 1818845407. The reversal of 1818845400 is 45488181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818845407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31539 + ... + 68061.

It is an arithmetic number, because the mean of its divisors is an integer number (59442810).

Almost surely, 2^1818845400 is an apocalyptic number.

1818845400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818845400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2853254880).

1818845400 is an abundant number, since it is smaller than the sum of its proper divisors (3887664360).

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

1818845400 is a wasteful number, since it uses less digits than its factorization.

1818845400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36625 (or 36616 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 39.

The square root of 1818845400 is about 42647.9237478215. The cubic root of 1818845400 is about 1220.6709111020.

The spelling of 1818845400 in words is "one billion, eight hundred eighteen million, eight hundred forty-five thousand, four hundred".