2500020 has 144 divisors (see below), whose sum is σ = 8648640. Its totient is φ = 580608.

The previous prime is 2500009. The next prime is 2500027. The reversal of 2500020 is 200052.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2499975 and 2500011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58119 + ... + 58161.

It is an arithmetic number, because the mean of its divisors is an integer number (60060).

2^2500020 is an apocalyptic number.

2500020 is a gapful number since it is divisible by the number (20) 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 2500020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4324320).

2500020 is an abundant number, since it is smaller than the sum of its proper divisors (6148620).

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

2500020 is a wasteful number, since it uses less digits than its factorization.

2500020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 9.

The square root of 2500020 is about 1581.1451546269. The cubic root of 2500020 is about 135.7212427511.

Adding to 2500020 its reverse (200052), we get a palindrome (2700072).

Subtracting from 2500020 its reverse (200052), we obtain a cube (2299968 = 132³).

The spelling of 2500020 in words is "two million, five hundred thousand, twenty".