30750940 has 72 divisors (see below), whose sum is σ = 72260496. Its totient is φ = 10982400.

The previous prime is 30750901. The next prime is 30750961. The reversal of 30750940 is 4905703.

It is a junction number, because it is equal to n+sod(n) for n = 30750899 and 30750908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234675 + ... + 234805.

It is an arithmetic number, because the mean of its divisors is an integer number (1003618).

Almost surely, 2^30750940 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 30750940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36130248).

30750940 is an abundant number, since it is smaller than the sum of its proper divisors (41509556).

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

30750940 is a wasteful number, since it uses less digits than its factorization.

30750940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 30750940 is about 5545.3530095026. The cubic root of 30750940 is about 313.2945201156.

The spelling of 30750940 in words is "thirty million, seven hundred fifty thousand, nine hundred forty".