30725394 has 64 divisors (see below), whose sum is σ = 74726400. Its totient is φ = 8227008.

The previous prime is 30725393. The next prime is 30725411. The reversal of 30725394 is 49352703.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30725393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110784 + ... + 111060.

It is an arithmetic number, because the mean of its divisors is an integer number (1167600).

Almost surely, 2^30725394 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30725394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37363200).

30725394 is an abundant number, since it is smaller than the sum of its proper divisors (44001006).

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

30725394 is a wasteful number, since it uses less digits than its factorization.

30725394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 30725394 is about 5543.0491608861. The cubic root of 30725394 is about 313.2077407729.

The spelling of 30725394 in words is "thirty million, seven hundred twenty-five thousand, three hundred ninety-four".