30261616 has 120 divisors (see below), whose sum is σ = 77606640. Its totient is φ = 11383680.

The previous prime is 30261613. The next prime is 30261643. The reversal of 30261616 is 61616203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30261613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1043490 + ... + 1043518.

It is an arithmetic number, because the mean of its divisors is an integer number (646722).

Almost surely, 2^30261616 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 30261616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38803320).

30261616 is an abundant number, since it is smaller than the sum of its proper divisors (47345024).

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

30261616 is a wasteful number, since it uses less digits than its factorization.

30261616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 30261616 is about 5501.0558986435. The cubic root of 30261616 is about 311.6238618646.

Adding to 30261616 its reverse (61616203), we get a palindrome (91877819).

The spelling of 30261616 in words is "thirty million, two hundred sixty-one thousand, six hundred sixteen".