161389004 has 12 divisors (see below), whose sum is σ = 322778064. Its totient is φ = 69166704.

The previous prime is 161389003. The next prime is 161389027. The reversal of 161389004 is 400983161.

It is a happy number.

161389004 is an admirable number.

It is a super-2 number, since 2×161389004² = 52092821224224032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161389001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881919 + ... + 2881974.

It is an arithmetic number, because the mean of its divisors is an integer number (26898172).

Almost surely, 2^161389004 is an apocalyptic number.

161389004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161389004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161389004 is a wasteful number, since it uses less digits than its factorization.

161389004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763904 (or 5763902 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 161389004 is about 12703.8971973171. The cubic root of 161389004 is about 544.4499728194.

The spelling of 161389004 in words is "one hundred sixty-one million, three hundred eighty-nine thousand, four".