181420794 has 12 divisors (see below), whose sum is σ = 393078426. Its totient is φ = 60473592.

The previous prime is 181420783. The next prime is 181420807. The reversal of 181420794 is 497024181.

It can be written as a sum of positive squares in only one way, i.e., 141919569 + 39501225 = 11913^2 + 6285^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5039449 + ... + 5039484.

Almost surely, 2^181420794 is an apocalyptic number.

181420794 is an abundant number, since it is smaller than the sum of its proper divisors (211657632).

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

181420794 is a wasteful number, since it uses less digits than its factorization.

181420794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10078941 (or 10078938 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 181420794 is about 13469.2536541562. The cubic root of 181420794 is about 566.1033016177.

The spelling of 181420794 in words is "one hundred eighty-one million, four hundred twenty thousand, seven hundred ninety-four".