1811120472 has 80 divisors (see below), whose sum is σ = 5797516560. Its totient is φ = 517461696.

The previous prime is 1811120461. The next prime is 1811120473. The reversal of 1811120472 is 2740211181.

1811120472 is a `hidden beast` number, since 1 + 81 + 112 + 0 + 472 = 666.

1811120472 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811120473) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 195103 + ... + 204174.

It is an arithmetic number, because the mean of its divisors is an integer number (72468957).

Almost surely, 2^1811120472 is an apocalyptic number.

1811120472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1811120472 is an abundant number, since it is smaller than the sum of its proper divisors (3986396088).

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

1811120472 is a wasteful number, since it uses less digits than its factorization.

1811120472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399302 (or 399289 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1811120472 is about 42557.2610960809. The cubic root of 1811120472 is about 1218.9403304168.

It can be divided in two parts, 18111 and 20472, that added together give a palindrome (38583).

The spelling of 1811120472 in words is "one billion, eight hundred eleven million, one hundred twenty thousand, four hundred seventy-two".