30525040 has 120 divisors (see below), whose sum is σ = 89056800. Its totient is φ = 9644544.

The previous prime is 30524983. The next prime is 30525041. The reversal of 30525040 is 4052503.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30524999 and 30525017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30525041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50661 + ... + 51259.

It is an arithmetic number, because the mean of its divisors is an integer number (742140).

Almost surely, 2^30525040 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 30525040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44528400).

30525040 is an abundant number, since it is smaller than the sum of its proper divisors (58531760).

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

30525040 is a wasteful number, since it uses less digits than its factorization.

30525040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 30525040 is about 5524.9470585699. The cubic root of 30525040 is about 312.5254677911.

Adding to 30525040 its reverse (4052503), we get a palindrome (34577543).

The spelling of 30525040 in words is "thirty million, five hundred twenty-five thousand, forty".