161238340 has 24 divisors (see below), whose sum is σ = 338869440. Its totient is φ = 64444128.

The previous prime is 161238317. The next prime is 161238379. The reversal of 161238340 is 43832161.

It is a junction number, because it is equal to n+sod(n) for n = 161238299 and 161238308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32121 + ... + 36799.

It is an arithmetic number, because the mean of its divisors is an integer number (14119560).

Almost surely, 2^161238340 is an apocalyptic number.

161238340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161238340 is an abundant number, since it is smaller than the sum of its proper divisors (177631100).

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

161238340 is a wasteful number, since it uses less digits than its factorization.

161238340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6411 (or 6409 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 161238340 is about 12697.9659788487. The cubic root of 161238340 is about 544.2804971057.

The spelling of 161238340 in words is "one hundred sixty-one million, two hundred thirty-eight thousand, three hundred forty".