30161208 has 128 divisors (see below), whose sum is σ = 99072000. Its totient is φ = 7413120.

The previous prime is 30161207. The next prime is 30161231. The reversal of 30161208 is 80216103.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30161203) 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, 34683 + ... + 35541.

It is an arithmetic number, because the mean of its divisors is an integer number (774000).

Almost surely, 2^30161208 is an apocalyptic number.

30161208 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30161208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49536000).

30161208 is an abundant number, since it is smaller than the sum of its proper divisors (68910792).

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

30161208 is a wasteful number, since it uses less digits than its factorization.

30161208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 30161208 is about 5491.9220679103. The cubic root of 30161208 is about 311.2788241237.

It can be divided in two parts, 3016 and 1208, that added together give a palindrome (4224).

The spelling of 30161208 in words is "thirty million, one hundred sixty-one thousand, two hundred eight".