1818972792 has 192 divisors, whose sum is σ = 6094932480. Its totient is φ = 477225216.

The previous prime is 1818972791. The next prime is 1818972797. The reversal of 1818972792 is 2972798181.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818972791) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1486693 + ... + 1487915.

It is an arithmetic number, because the mean of its divisors is an integer number (31744440).

Almost surely, 2^1818972792 is an apocalyptic number.

1818972792 is a gapful number since it is divisible by the number (12) 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 1818972792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3047466240).

1818972792 is an abundant number, since it is smaller than the sum of its proper divisors (4275959688).

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

1818972792 is a wasteful number, since it uses less digits than its factorization.

1818972792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482 (or 1475 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 54.

The square root of 1818972792 is about 42649.4172527597. The cubic root of 1818972792 is about 1220.6994090488.

The spelling of 1818972792 in words is "one billion, eight hundred eighteen million, nine hundred seventy-two thousand, seven hundred ninety-two".