1808147731 has 12 divisors (see below), whose sum is σ = 1984769688. Its totient is φ = 1646184384.

The previous prime is 1808147701. The next prime is 1808147741. The reversal of 1808147731 is 1377418081.

It is not a de Polignac number, because 1808147731 - 2¹⁹ = 1807623443 is a prime.

It is a super-2 number, since 2×1808147731² = 6538796434240896722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808147701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60945 + ... + 85618.

It is an arithmetic number, because the mean of its divisors is an integer number (165397474).

Almost surely, 2^1808147731 is an apocalyptic number.

1808147731 is a deficient number, since it is larger than the sum of its proper divisors (176621957).

1808147731 is a wasteful number, since it uses less digits than its factorization.

1808147731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146662 (or 146649 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 1808147731 is about 42522.3203858868. The cubic root of 1808147731 is about 1218.2730495208.

The spelling of 1808147731 in words is "one billion, eight hundred eight million, one hundred forty-seven thousand, seven hundred thirty-one".