30042656 has 48 divisors (see below), whose sum is σ = 68584320. Its totient is φ = 12687360.

The previous prime is 30042643. The next prime is 30042671. The reversal of 30042656 is 65624003.

It is a super-2 number, since 2×30042656² = 1805122359068672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14960 + ... + 16848.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^30042656 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 30042656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34292160).

30042656 is an abundant number, since it is smaller than the sum of its proper divisors (38541664).

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

30042656 is a wasteful number, since it uses less digits than its factorization.

30042656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1969 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 30042656 is about 5481.1181341037. The cubic root of 30042656 is about 310.8704498624.

Adding to 30042656 its reverse (65624003), we get a palindrome (95666659).

The spelling of 30042656 in words is "thirty million, forty-two thousand, six hundred fifty-six".