181378074 has 16 divisors (see below), whose sum is σ = 367127712. Its totient is φ = 59730768.

The previous prime is 181378061. The next prime is 181378079. The reversal of 181378074 is 470873181.

It is not an unprimeable number, because it can be changed into a prime (181378079) 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, 181609 + ... + 182604.

It is an arithmetic number, because the mean of its divisors is an integer number (22945482).

Almost surely, 2^181378074 is an apocalyptic number.

181378074 is an abundant number, since it is smaller than the sum of its proper divisors (185749638).

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

181378074 is a wasteful number, since it uses less digits than its factorization.

181378074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364301.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 181378074 is about 13467.6677268189. The cubic root of 181378074 is about 566.0588638018.

The spelling of 181378074 in words is "one hundred eighty-one million, three hundred seventy-eight thousand, seventy-four".