620724225 has 48 divisors (see below), whose sum is σ = 1124124480. Its totient is φ = 299731200.

The previous prime is 620724217. The next prime is 620724229. The reversal of 620724225 is 522427026.

It is not a de Polignac number, because 620724225 - 2³ = 620724217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 620724192 and 620724201.

It is not an unprimeable number, because it can be changed into a prime (620724229) 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, 220527 + ... + 223323.

It is an arithmetic number, because the mean of its divisors is an integer number (23419260).

It is a Proth number, since it is equal to 18943 ⋅ 2¹⁵ + 1 and 18943 < 2¹⁵.

Almost surely, 2^620724225 is an apocalyptic number.

It is an amenable number.

620724225 is a deficient number, since it is larger than the sum of its proper divisors (503400255).

620724225 is a wasteful number, since it uses less digits than its factorization.

620724225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090 (or 3085 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 620724225 is about 24914.3377395427. The cubic root of 620724225 is about 853.0337842070.

The spelling of 620724225 in words is "six hundred twenty million, seven hundred twenty-four thousand, two hundred twenty-five".