161743400 has 96 divisors (see below), whose sum is σ = 462887040. Its totient is φ = 51183360.

The previous prime is 161743381. The next prime is 161743459. The reversal of 161743400 is 4347161.

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 161743400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13757 + ... + 22643.

It is an arithmetic number, because the mean of its divisors is an integer number (4821740).

Almost surely, 2^161743400 is an apocalyptic number.

161743400 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 161743400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231443520).

161743400 is an abundant number, since it is smaller than the sum of its proper divisors (301143640).

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

161743400 is a wasteful number, since it uses less digits than its factorization.

161743400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923 (or 8914 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 161743400 is about 12717.8378665558. The cubic root of 161743400 is about 544.8482028215.

The spelling of 161743400 in words is "one hundred sixty-one million, seven hundred forty-three thousand, four hundred".