2520400500 has 72 divisors (see below), whose sum is σ = 7951037640. Its totient is φ = 672105600.

The previous prime is 2520400499. The next prime is 2520400537. The reversal of 2520400500 is 50040252.

It can be written as a sum of positive squares in 4 ways, for example, as 110376036 + 2410024464 = 10506^2 + 49092^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275545 + ... + 284544.

Almost surely, 2^2520400500 is an apocalyptic number.

2520400500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2520400500 is an abundant number, since it is smaller than the sum of its proper divisors (5430637140).

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

2520400500 is a wasteful number, since it uses less digits than its factorization.

2520400500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560114 (or 560099 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 2520400500 is about 50203.5905090463. The cubic root of 2520400500 is about 1360.8905103479.

Adding to 2520400500 its reverse (50040252), we get a palindrome (2570440752).

The spelling of 2520400500 in words is "two billion, five hundred twenty million, four hundred thousand, five hundred".