161027740 has 24 divisors (see below), whose sum is σ = 358050672. Its totient is φ = 60622080.

The previous prime is 161027731. The next prime is 161027743. The reversal of 161027740 is 47720161.

It is a junction number, because it is equal to n+sod(n) for n = 161027699 and 161027708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161027743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236466 + ... + 237145.

It is an arithmetic number, because the mean of its divisors is an integer number (14918778).

Almost surely, 2^161027740 is an apocalyptic number.

161027740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161027740 is an abundant number, since it is smaller than the sum of its proper divisors (197022932).

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

161027740 is a wasteful number, since it uses less digits than its factorization.

161027740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473637 (or 473635 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 161027740 is about 12689.6706025019. The cubic root of 161027740 is about 544.0434248423.

The spelling of 161027740 in words is "one hundred sixty-one million, twenty-seven thousand, seven hundred forty".