181402830 has 96 divisors (see below), whose sum is σ = 557668800. Its totient is φ = 40029696.

The previous prime is 181402829. The next prime is 181402841. The reversal of 181402830 is 38204181.

181402830 is a `hidden beast` number, since 181 + 402 + 83 + 0 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 181402794 and 181402803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13306 + ... + 23234.

It is an arithmetic number, because the mean of its divisors is an integer number (5809050).

Almost surely, 2^181402830 is an apocalyptic number.

181402830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 181402830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278834400).

181402830 is an abundant number, since it is smaller than the sum of its proper divisors (376265970).

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

181402830 is a wasteful number, since it uses less digits than its factorization.

181402830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9978 (or 9975 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 181402830 is about 13468.5867855540. The cubic root of 181402830 is about 566.0846161166.

The spelling of 181402830 in words is "one hundred eighty-one million, four hundred two thousand, eight hundred thirty".