625540020 has 96 divisors (see below), whose sum is σ = 2012360448. Its totient is φ = 142221312.

The previous prime is 625539989. The next prime is 625540031. The reversal of 625540020 is 20045526.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77202 + ... + 84918.

It is an arithmetic number, because the mean of its divisors is an integer number (20962088).

Almost surely, 2^625540020 is an apocalyptic number.

625540020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625540020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1006180224).

625540020 is an abundant number, since it is smaller than the sum of its proper divisors (1386820428).

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

625540020 is a wasteful number, since it uses less digits than its factorization.

625540020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7929 (or 7927 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 625540020 is about 25010.7980680345. The cubic root of 625540020 is about 855.2341481072.

Adding to 625540020 its reverse (20045526), we get a palindrome (645585546).

The spelling of 625540020 in words is "six hundred twenty-five million, five hundred forty thousand, twenty".