1813226724 has 81 divisors (see below), whose sum is σ = 4714247811. Its totient is φ = 587631600.

The previous prime is 1813226713. The next prime is 1813226731. The reversal of 1813226724 is 4276223181.

It is a happy number.

The square root of 1813226724 is 42582.

It is a perfect power (a square), and thus also a powerful number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12008049 + ... + 12008199.

Almost surely, 2^1813226724 is an apocalyptic number.

1813226724 is the 42582-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1813226724

1813226724 is an abundant number, since it is smaller than the sum of its proper divisors (2901021087).

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

1813226724 is a wasteful number, since it uses less digits than its factorization.

1813226724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 203 counting only the distinct ones).

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

The cubic root of 1813226724 is about 1219.4126716987.

Multiplying 1813226724 by its sum of digits (36), we get a square (65276162064 = 255492²).

1813226724 divided by its sum of digits (36) gives a square (50367409 = 7097²).

The spelling of 1813226724 in words is "one billion, eight hundred thirteen million, two hundred twenty-six thousand, seven hundred twenty-four".