2620928025 has 27 divisors (see below), whose sum is σ = 4695749149. Its totient is φ = 1397418720.

The previous prime is 2620928017. The next prime is 2620928027. The reversal of 2620928025 is 5208290262.

The square root of 2620928025 is 51195.

It is a perfect power (a square), and thus also a powerful number.

2620928025 is a `hidden beast` number, since 2 + 620 + 9 + 2 + 8 + 0 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 403648281 + 2217279744 = 20091^2 + 47088^2 .

It is not a de Polignac number, because 2620928025 - 2³ = 2620928017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620928027) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 766219 + ... + 769631.

Almost surely, 2^2620928025 is an apocalyptic number.

2620928025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2620928025 is the 51195-th square number.

2620928025 is the 25598-th centered octagonal number.

It is an amenable number.

2620928025 is a deficient number, since it is larger than the sum of its proper divisors (2074821124).

2620928025 is an frugal number, since it uses more digits than its factorization.

2620928025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842 (or 3421 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The cubic root of 2620928025 is about 1378.7484320472.

Multiplying 2620928025 by its sum of digits (36), we get a square (94353408900 = 307170²).

The spelling of 2620928025 in words is "two billion, six hundred twenty million, nine hundred twenty-eight thousand, twenty-five".