181495040 has 36 divisors (see below), whose sum is σ = 434740404. Its totient is φ = 72597504.

The previous prime is 181495037. The next prime is 181495073. The reversal of 181495040 is 40594181.

It can be written as a sum of positive squares in 2 ways, for example, as 65545216 + 115949824 = 8096^2 + 10768^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 181494988 and 181495006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69617 + ... + 72176.

Almost surely, 2^181495040 is an apocalyptic number.

181495040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181495040 is an abundant number, since it is smaller than the sum of its proper divisors (253245364).

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

181495040 is an equidigital number, since it uses as much as digits as its factorization.

181495040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141814 (or 141800 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 181495040 is about 13472.0095011843. The cubic root of 181495040 is about 566.1805165324.

The spelling of 181495040 in words is "one hundred eighty-one million, four hundred ninety-five thousand, forty".