181490874 has 64 divisors (see below), whose sum is σ = 389283840. Its totient is φ = 56306880.

The previous prime is 181490867. The next prime is 181490879. The reversal of 181490874 is 478094181.

181490874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (181490879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 950119 + ... + 950309.

It is an arithmetic number, because the mean of its divisors is an integer number (6082560).

Almost surely, 2^181490874 is an apocalyptic number.

181490874 is an abundant number, since it is smaller than the sum of its proper divisors (207792966).

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

181490874 is a wasteful number, since it uses less digits than its factorization.

181490874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 181490874 is about 13471.8548834227. The cubic root of 181490874 is about 566.1761845020.

The spelling of 181490874 in words is "one hundred eighty-one million, four hundred ninety thousand, eight hundred seventy-four".