30907136 has 72 divisors (see below), whose sum is σ = 68506704. Its totient is φ = 13824000.

The previous prime is 30907117. The next prime is 30907159. The reversal of 30907136 is 63170903.

It is a junction number, because it is equal to n+sod(n) for n = 30907099 and 30907108.

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, 123011 + ... + 123261.

It is an arithmetic number, because the mean of its divisors is an integer number (951482).

Almost surely, 2^30907136 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 30907136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34253352).

30907136 is an abundant number, since it is smaller than the sum of its proper divisors (37599568).

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

30907136 is a wasteful number, since it uses less digits than its factorization.

30907136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 30907136 is about 5559.4186746458. The cubic root of 30907136 is about 313.8240728163.

The spelling of 30907136 in words is "thirty million, nine hundred seven thousand, one hundred thirty-six".