181363428 has 24 divisors (see below), whose sum is σ = 470201760. Its totient is φ = 60454440.

The previous prime is 181363411. The next prime is 181363433. The reversal of 181363428 is 824363181.

181363428 is a `hidden beast` number, since 1 + 8 + 13 + 634 + 2 + 8 = 666.

181363428 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×181363428² = 65785386031822368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

181363428 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 181363392 and 181363401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839538 + ... + 839753.

It is an arithmetic number, because the mean of its divisors is an integer number (19591740).

Almost surely, 2^181363428 is an apocalyptic number.

181363428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

181363428 is an abundant number, since it is smaller than the sum of its proper divisors (288838332).

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

181363428 is a wasteful number, since it uses less digits than its factorization.

181363428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679304 (or 1679296 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 181363428 is about 13467.1239691331. The cubic root of 181363428 is about 566.0436272647.

It can be divided in two parts, 181 and 363428, that added together give a square (363609 = 603²).

The spelling of 181363428 in words is "one hundred eighty-one million, three hundred sixty-three thousand, four hundred twenty-eight".