1813426272 has 384 divisors, whose sum is σ = 6528614400. Its totient is φ = 478130688.

The previous prime is 1813426271. The next prime is 1813426297. The reversal of 1813426272 is 2726243181.

It is a happy number.

1813426272 is a `hidden beast` number, since 18 + 13 + 4 + 2 + 627 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 (1813426271) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4941033 + ... + 4941399.

It is an arithmetic number, because the mean of its divisors is an integer number (17001600).

Almost surely, 2^1813426272 is an apocalyptic number.

1813426272 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 1813426272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3264307200).

1813426272 is an abundant number, since it is smaller than the sum of its proper divisors (4715188128).

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

1813426272 is a wasteful number, since it uses less digits than its factorization.

1813426272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 441 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1813426272 is about 42584.3430382576. The cubic root of 1813426272 is about 1219.4574027171.

The spelling of 1813426272 in words is "one billion, eight hundred thirteen million, four hundred twenty-six thousand, two hundred seventy-two".