30215328 has 192 divisors, whose sum is σ = 97542144. Its totient is φ = 8064000.

The previous prime is 30215327. The next prime is 30215329. The reversal of 30215328 is 82351203.

It is an interprime number because it is at equal distance from previous prime (30215327) and next prime (30215329).

It is a super-2 number, since 2×30215328² = 1825932092295168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 30215298 and 30215307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30215321) 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, 425533 + ... + 425603.

It is an arithmetic number, because the mean of its divisors is an integer number (508032).

Almost surely, 2^30215328 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 30215328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48771072).

30215328 is an abundant number, since it is smaller than the sum of its proper divisors (67326816).

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

30215328 is a wasteful number, since it uses less digits than its factorization.

30215328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 30215328 is about 5496.8470962907. The cubic root of 30215328 is about 311.4648947416.

The spelling of 30215328 in words is "thirty million, two hundred fifteen thousand, three hundred twenty-eight".