1808042472 has 56 divisors (see below), whose sum is σ = 5082810690. Its totient is φ = 602678880.

The previous prime is 1808042471. The next prime is 1808042507. The reversal of 1808042472 is 2742408081.

1808042472 is a `hidden beast` number, since 180 + 8 + 0 + 4 + 2 + 472 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1266363396 + 541679076 = 35586^2 + 23274^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1808042471) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 149179 + ... + 160842.

Almost surely, 2^1808042472 is an apocalyptic number.

1808042472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1808042472 is an abundant number, since it is smaller than the sum of its proper divisors (3274768218).

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

1808042472 is an equidigital number, since it uses as much as digits as its factorization.

1808042472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310045 (or 310026 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 1808042472 is about 42521.0826767146. The cubic root of 1808042472 is about 1218.2494089946.

The spelling of 1808042472 in words is "one billion, eight hundred eight million, forty-two thousand, four hundred seventy-two".