181904412 has 24 divisors (see below), whose sum is σ = 425440512. Its totient is φ = 60492400.

The previous prime is 181904383. The next prime is 181904419. The reversal of 181904412 is 214409181.

181904412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 181904412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181904419) 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, 12414 + ... + 22757.

It is an arithmetic number, because the mean of its divisors is an integer number (17726688).

Almost surely, 2^181904412 is an apocalyptic number.

181904412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181904412 is an abundant number, since it is smaller than the sum of its proper divisors (243536100).

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

181904412 is a wasteful number, since it uses less digits than its factorization.

181904412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35609 (or 35607 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 181904412 is about 13487.1943709580. The cubic root of 181904412 is about 566.6058806001.

The spelling of 181904412 in words is "one hundred eighty-one million, nine hundred four thousand, four hundred twelve".