30745120 has 96 divisors (see below), whose sum is σ = 84163968. Its totient is φ = 10395648.

The previous prime is 30745103. The next prime is 30745147. The reversal of 30745120 is 2154703.

It is a junction number, because it is equal to n+sod(n) for n = 30745091 and 30745100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108499 + ... + 108781.

It is an arithmetic number, because the mean of its divisors is an integer number (876708).

Almost surely, 2^30745120 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 30745120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42081984).

30745120 is an abundant number, since it is smaller than the sum of its proper divisors (53418848).

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

30745120 is a wasteful number, since it uses less digits than its factorization.

30745120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 30745120 is about 5544.8282209641. The cubic root of 30745120 is about 313.2747538998.

Adding to 30745120 its reverse (2154703), we get a palindrome (32899823).

The spelling of 30745120 in words is "thirty million, seven hundred forty-five thousand, one hundred twenty".