161403798 has 16 divisors (see below), whose sum is σ = 330681456. Its totient is φ = 52488960.

The previous prime is 161403787. The next prime is 161403799. The reversal of 161403798 is 897304161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161403799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327811 + ... + 328302.

It is an arithmetic number, because the mean of its divisors is an integer number (20667591).

Almost surely, 2^161403798 is an apocalyptic number.

161403798 is an abundant number, since it is smaller than the sum of its proper divisors (169277658).

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

161403798 is a wasteful number, since it uses less digits than its factorization.

161403798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656159.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 161403798 is about 12704.4794462426. The cubic root of 161403798 is about 544.4666082914.

The spelling of 161403798 in words is "one hundred sixty-one million, four hundred three thousand, seven hundred ninety-eight".