161469840 has 160 divisors (see below), whose sum is σ = 575963136. Its totient is φ = 36656640.

The previous prime is 161469839. The next prime is 161469877. The reversal of 161469840 is 48964161.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 374425 + ... + 374855.

Almost surely, 2^161469840 is an apocalyptic number.

161469840 is a gapful number since it is divisible by the number (10) 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 161469840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287981568).

161469840 is an abundant number, since it is smaller than the sum of its proper divisors (414493296).

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

161469840 is a wasteful number, since it uses less digits than its factorization.

161469840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 161469840 is about 12707.0783424043. The cubic root of 161469840 is about 544.5408584247.

The spelling of 161469840 in words is "one hundred sixty-one million, four hundred sixty-nine thousand, eight hundred forty".