161406320 has 20 divisors (see below), whose sum is σ = 375269880. Its totient is φ = 64562496.

The previous prime is 161406317. The next prime is 161406331. The reversal of 161406320 is 23604161.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1008710 + ... + 1008869.

It is an arithmetic number, because the mean of its divisors is an integer number (18763494).

Almost surely, 2^161406320 is an apocalyptic number.

161406320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161406320 is an abundant number, since it is smaller than the sum of its proper divisors (213863560).

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

161406320 is a wasteful number, since it uses less digits than its factorization.

161406320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017592 (or 2017586 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 161406320 is about 12704.5787021845. The cubic root of 161406320 is about 544.4694441141.

The spelling of 161406320 in words is "one hundred sixty-one million, four hundred six thousand, three hundred twenty".