30725000 has 48 divisors (see below), whose sum is σ = 72065700. Its totient is φ = 12280000.

The previous prime is 30724997. The next prime is 30725047. The reversal of 30725000 is 52703.

It can be written as a sum of positive squares in 6 ways, for example, as 11236 + 30713764 = 106^2 + 5542^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30725000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24386 + ... + 25614.

Almost surely, 2^30725000 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 30725000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36032850).

30725000 is an abundant number, since it is smaller than the sum of its proper divisors (41340700).

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

30725000 is an equidigital number, since it uses as much as digits as its factorization.

30725000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 30725000 is about 5543.0136207662. The cubic root of 30725000 is about 313.2064019848.

Adding to 30725000 its reverse (52703), we get a palindrome (30777703).

The spelling of 30725000 in words is "thirty million, seven hundred twenty-five thousand".