161386938 has 16 divisors (see below), whose sum is σ = 358637760. Its totient is φ = 53795628.

The previous prime is 161386913. The next prime is 161386957. The reversal of 161386938 is 839683161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 161386893 and 161386902.

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, 1494270 + ... + 1494377.

It is an arithmetic number, because the mean of its divisors is an integer number (22414860).

Almost surely, 2^161386938 is an apocalyptic number.

161386938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161386938 is an abundant number, since it is smaller than the sum of its proper divisors (197250822).

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

161386938 is a wasteful number, since it uses less digits than its factorization.

161386938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988658 (or 2988652 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 161386938 is about 12703.8158834265. The cubic root of 161386938 is about 544.4476495747.

The spelling of 161386938 in words is "one hundred sixty-one million, three hundred eighty-six thousand, nine hundred thirty-eight".