161249382 has 24 divisors (see below), whose sum is σ = 399284496. Its totient is φ = 46071216.

The previous prime is 161249381. The next prime is 161249401. The reversal of 161249382 is 283942161.

161249382 is a `hidden beast` number, since 1 + 612 + 4 + 9 + 38 + 2 = 666.

161249382 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161249381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 639753 + ... + 640004.

It is an arithmetic number, because the mean of its divisors is an integer number (16636854).

Almost surely, 2^161249382 is an apocalyptic number.

161249382 is an abundant number, since it is smaller than the sum of its proper divisors (238035114).

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

161249382 is a wasteful number, since it uses less digits than its factorization.

161249382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279772 (or 1279769 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 161249382 is about 12698.4007654507. The cubic root of 161249382 is about 544.2929213799.

The spelling of 161249382 in words is "one hundred sixty-one million, two hundred forty-nine thousand, three hundred eighty-two".