161339328 has 42 divisors (see below), whose sum is σ = 462451704. Its totient is φ = 53779584.

The previous prime is 161339309. The next prime is 161339341. The reversal of 161339328 is 823933161.

161339328 is a `hidden beast` number, since 1 + 613 + 3 + 9 + 32 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 161339292 and 161339301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139476 + ... + 140627.

Almost surely, 2^161339328 is an apocalyptic number.

161339328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161339328 is an abundant number, since it is smaller than the sum of its proper divisors (301112376).

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

161339328 is a wasteful number, since it uses less digits than its factorization.

161339328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280121 (or 280108 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 161339328 is about 12701.9418987807. The cubic root of 161339328 is about 544.3941059974.

The spelling of 161339328 in words is "one hundred sixty-one million, three hundred thirty-nine thousand, three hundred twenty-eight".