525444420 has 96 divisors (see below), whose sum is σ = 1534288896. Its totient is φ = 134208000.

The previous prime is 525444401. The next prime is 525444421. The reversal of 525444420 is 24444525.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (525444421) 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, 186462 + ... + 189258.

It is an arithmetic number, because the mean of its divisors is an integer number (15982176).

Almost surely, 2^525444420 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 525444420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (767144448).

525444420 is an abundant number, since it is smaller than the sum of its proper divisors (1008844476).

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

525444420 is a wasteful number, since it uses less digits than its factorization.

525444420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941 (or 2939 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

The square root of 525444420 is about 22922.5744627431. The cubic root of 525444420 is about 806.9418905443.

Adding to 525444420 its reverse (24444525), we get a palindrome (549888945).

The spelling of 525444420 in words is "five hundred twenty-five million, four hundred forty-four thousand, four hundred twenty".