181486340 has 24 divisors (see below), whose sum is σ = 435567552. Its totient is φ = 62223840.

The previous prime is 181486297. The next prime is 181486343. The reversal of 181486340 is 43684181.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 181486340.

It is not an unprimeable number, because it can be changed into a prime (181486343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 648026 + ... + 648305.

It is an arithmetic number, because the mean of its divisors is an integer number (18148648).

Almost surely, 2^181486340 is an apocalyptic number.

181486340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181486340 is an abundant number, since it is smaller than the sum of its proper divisors (254081212).

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

181486340 is a wasteful number, since it uses less digits than its factorization.

181486340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296347 (or 1296345 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 181486340 is about 13471.6866056185. The cubic root of 181486340 is about 566.1714697301.

The spelling of 181486340 in words is "one hundred eighty-one million, four hundred eighty-six thousand, three hundred forty".