161670312 has 96 divisors (see below), whose sum is σ = 459950400. Its totient is φ = 51203328.

The previous prime is 161670307. The next prime is 161670319. The reversal of 161670312 is 213076161.

It is a super-2 number, since 2×161670312² = 52274579564354688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161670319) 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, 385639 + ... + 386057.

It is an arithmetic number, because the mean of its divisors is an integer number (4791150).

Almost surely, 2^161670312 is an apocalyptic number.

161670312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161670312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229975200).

161670312 is an abundant number, since it is smaller than the sum of its proper divisors (298280088).

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

161670312 is a wasteful number, since it uses less digits than its factorization.

161670312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 161670312 is about 12714.9640974719. The cubic root of 161670312 is about 544.7661224705.

The spelling of 161670312 in words is "one hundred sixty-one million, six hundred seventy thousand, three hundred twelve".