161238730 has 16 divisors (see below), whose sum is σ = 292447584. Its totient is φ = 64002640.

The previous prime is 161238709. The next prime is 161238733. The reversal of 161238730 is 37832161.

161238730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161238692 and 161238701.

It is not an unprimeable number, because it can be changed into a prime (161238733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60232 + ... + 62851.

It is an arithmetic number, because the mean of its divisors is an integer number (18277974).

Almost surely, 2^161238730 is an apocalyptic number.

161238730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161238730 is a deficient number, since it is larger than the sum of its proper divisors (131208854).

161238730 is a wasteful number, since it uses less digits than its factorization.

161238730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123221.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 161238730 is about 12697.9813356297. The cubic root of 161238730 is about 544.2809359369.

The spelling of 161238730 in words is "one hundred sixty-one million, two hundred thirty-eight thousand, seven hundred thirty".