161446220 has 24 divisors (see below), whose sum is σ = 365117424. Its totient is φ = 59610816.

The previous prime is 161446193. The next prime is 161446247. The reversal of 161446220 is 22644161.

It is an interprime number because it is at equal distance from previous prime (161446193) and next prime (161446247).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 161446220.

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, 310214 + ... + 310733.

It is an arithmetic number, because the mean of its divisors is an integer number (15213226).

Almost surely, 2^161446220 is an apocalyptic number.

161446220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161446220 is an abundant number, since it is smaller than the sum of its proper divisors (203671204).

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

161446220 is a wasteful number, since it uses less digits than its factorization.

161446220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620969 (or 620967 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 161446220 is about 12706.1489051561. The cubic root of 161446220 is about 544.5143051021.

The spelling of 161446220 in words is "one hundred sixty-one million, four hundred forty-six thousand, two hundred twenty".