161440308 has 36 divisors (see below), whose sum is σ = 410837700. Its totient is φ = 53450496.

The previous prime is 161440273. The next prime is 161440327. The reversal of 161440308 is 803044161.

161440308 is a `hidden beast` number, since 1 + 614 + 40 + 3 + 0 + 8 = 666.

161440308 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8225424 + 153214884 = 2868^2 + 12378^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9685 + ... + 20412.

Almost surely, 2^161440308 is an apocalyptic number.

161440308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161440308 is an abundant number, since it is smaller than the sum of its proper divisors (249397392).

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

161440308 is a wasteful number, since it uses less digits than its factorization.

161440308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30256 (or 30251 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 161440308 is about 12705.9162597587. The cubic root of 161440308 is about 544.5076584969.

Adding to 161440308 its reverse (803044161), we get a palindrome (964484469).

The spelling of 161440308 in words is "one hundred sixty-one million, four hundred forty thousand, three hundred eight".