1811284740 has 120 divisors (see below), whose sum is σ = 5865522432. Its totient is φ = 467415360.

The previous prime is 1811284733. The next prime is 1811284817. The reversal of 1811284740 is 474821181.

1811284740 is a `hidden beast` number, since 181 + 1 + 2 + 8 + 474 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 1811284695 and 1811284704.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32187 + ... + 68253.

Almost surely, 2^1811284740 is an apocalyptic number.

1811284740 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 1811284740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2932761216).

1811284740 is an abundant number, since it is smaller than the sum of its proper divisors (4054237692).

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

1811284740 is a wasteful number, since it uses less digits than its factorization.

1811284740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36119 (or 36108 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 1811284740 is about 42559.1910167475. The cubic root of 1811284740 is about 1218.9771817914.

The spelling of 1811284740 in words is "one billion, eight hundred eleven million, two hundred eighty-four thousand, seven hundred forty".