30161404 has 96 divisors (see below), whose sum is σ = 69543936. Its totient is φ = 11128320.

The previous prime is 30161393. The next prime is 30161407. The reversal of 30161404 is 40416103.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30161407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641709 + ... + 641755.

It is an arithmetic number, because the mean of its divisors is an integer number (724416).

Almost surely, 2^30161404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30161404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34771968).

30161404 is an abundant number, since it is smaller than the sum of its proper divisors (39382532).

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

30161404 is a wasteful number, since it uses less digits than its factorization.

30161404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 30161404 is about 5491.9399122714. The cubic root of 30161404 is about 311.2794983951.

Adding to 30161404 its reverse (40416103), we get a palindrome (70577507).

The spelling of 30161404 in words is "thirty million, one hundred sixty-one thousand, four hundred four".