161730630 has 48 divisors (see below), whose sum is σ = 426791664. Its totient is φ = 42482880.

The previous prime is 161730629. The next prime is 161730631. The reversal of 161730630 is 36037161.

161730630 is a `hidden beast` number, since 16 + 17 + 3 + 0 + 630 = 666.

It is an interprime number because it is at equal distance from previous prime (161730629) and next prime (161730631).

It is a junction number, because it is equal to n+sod(n) for n = 161730594 and 161730603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161730631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7381 + ... + 19440.

It is an arithmetic number, because the mean of its divisors is an integer number (8891493).

Almost surely, 2^161730630 is an apocalyptic number.

161730630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161730630 is an abundant number, since it is smaller than the sum of its proper divisors (265061034).

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

161730630 is a wasteful number, since it uses less digits than its factorization.

161730630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26901 (or 26898 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 161730630 is about 12717.3358058990. The cubic root of 161730630 is about 544.8338634530.

Adding to 161730630 its reverse (36037161), we get a palindrome (197767791).

The spelling of 161730630 in words is "one hundred sixty-one million, seven hundred thirty thousand, six hundred thirty".