161434040 has 64 divisors (see below), whose sum is σ = 393608160. Its totient is φ = 59351040.

The previous prime is 161434037. The next prime is 161434099. The reversal of 161434040 is 40434161.

It is a junction number, because it is equal to n+sod(n) for n = 161433997 and 161434015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26480 + ... + 32000.

Almost surely, 2^161434040 is an apocalyptic number.

161434040 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 161434040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196804080).

161434040 is an abundant number, since it is smaller than the sum of its proper divisors (232174120).

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

161434040 is a wasteful number, since it uses less digits than its factorization.

161434040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5592 (or 5588 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 161434040 is about 12705.6696006153. The cubic root of 161434040 is about 544.5006114791.

The spelling of 161434040 in words is "one hundred sixty-one million, four hundred thirty-four thousand, forty".