30071232 has 168 divisors, whose sum is σ = 94859856. Its totient is φ = 9068544.

The previous prime is 30071203. The next prime is 30071287. The reversal of 30071232 is 23217003.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362263 + ... + 362345.

It is an arithmetic number, because the mean of its divisors is an integer number (564642).

Almost surely, 2^30071232 is an apocalyptic number.

30071232 is a gapful number since it is divisible by the number (32) 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 30071232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47429928).

30071232 is an abundant number, since it is smaller than the sum of its proper divisors (64788624).

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

30071232 is a wasteful number, since it uses less digits than its factorization.

30071232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 30071232 is about 5483.7242819091. The cubic root of 30071232 is about 310.9689833040.

Adding to 30071232 its reverse (23217003), we get a palindrome (53288235).

It can be divided in two parts, 30071 and 232, that added together give a palindrome (30303).

The spelling of 30071232 in words is "thirty million, seventy-one thousand, two hundred thirty-two".