181461492 has 48 divisors (see below), whose sum is σ = 471184000. Its totient is φ = 60393600.

The previous prime is 181461479. The next prime is 181461493. The reversal of 181461492 is 294164181.

181461492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181461493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129009 + ... + 130407.

Almost surely, 2^181461492 is an apocalyptic number.

181461492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181461492 is an abundant number, since it is smaller than the sum of its proper divisors (289722508).

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

181461492 is a wasteful number, since it uses less digits than its factorization.

181461492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613 (or 2605 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 181461492 is about 13470.7643435701. The cubic root of 181461492 is about 566.1456296388.

The spelling of 181461492 in words is "one hundred eighty-one million, four hundred sixty-one thousand, four hundred ninety-two".