161842398 has 32 divisors (see below), whose sum is σ = 338556672. Its totient is φ = 51480000.

The previous prime is 161842393. The next prime is 161842423. The reversal of 161842398 is 893248161.

161842398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161842391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70773 + ... + 73023.

It is an arithmetic number, because the mean of its divisors is an integer number (10579896).

Almost surely, 2^161842398 is an apocalyptic number.

161842398 is an abundant number, since it is smaller than the sum of its proper divisors (176714274).

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

161842398 is a wasteful number, since it uses less digits than its factorization.

161842398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800.

The product of its digits is 82944, while the sum is 42.

The square root of 161842398 is about 12721.7293635732. The cubic root of 161842398 is about 544.9593415787.

The spelling of 161842398 in words is "one hundred sixty-one million, eight hundred forty-two thousand, three hundred ninety-eight".