161824380 has 24 divisors (see below), whose sum is σ = 453108432. Its totient is φ = 43153152.

The previous prime is 161824361. The next prime is 161824393. The reversal of 161824380 is 83428161.

It is a congruent number.

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, 1348477 + ... + 1348596.

It is an arithmetic number, because the mean of its divisors is an integer number (18879518).

Almost surely, 2^161824380 is an apocalyptic number.

161824380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161824380 is an abundant number, since it is smaller than the sum of its proper divisors (291284052).

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

161824380 is a wasteful number, since it uses less digits than its factorization.

161824380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697085 (or 2697083 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 161824380 is about 12721.0211854238. The cubic root of 161824380 is about 544.9391172906.

The spelling of 161824380 in words is "one hundred sixty-one million, eight hundred twenty-four thousand, three hundred eighty".