161726430 has 32 divisors (see below), whose sum is σ = 393062400. Its totient is φ = 42580512.

The previous prime is 161726407. The next prime is 161726431. The reversal of 161726430 is 34627161.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161726431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31750 + ... + 36489.

It is an arithmetic number, because the mean of its divisors is an integer number (12283200).

Almost surely, 2^161726430 is an apocalyptic number.

161726430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161726430 is an abundant number, since it is smaller than the sum of its proper divisors (231335970).

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

161726430 is a wasteful number, since it uses less digits than its factorization.

161726430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68328.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 161726430 is about 12717.1706759011. The cubic root of 161726430 is about 544.8291471292.

The spelling of 161726430 in words is "one hundred sixty-one million, seven hundred twenty-six thousand, four hundred thirty".