620407252 has 24 divisors (see below), whose sum is σ = 1102346280. Its totient is φ = 305479680.

The previous prime is 620407219. The next prime is 620407259. The reversal of 620407252 is 252704026.

It can be written as a sum of positive squares in 4 ways, for example, as 155401156 + 465006096 = 12466^2 + 21564^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 620407252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620407259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88102 + ... + 94882.

It is an arithmetic number, because the mean of its divisors is an integer number (45931095).

Almost surely, 2^620407252 is an apocalyptic number.

It is an amenable number.

620407252 is a deficient number, since it is larger than the sum of its proper divisors (481939028).

620407252 is a wasteful number, since it uses less digits than its factorization.

620407252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131 (or 7129 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 620407252 is about 24907.9756704554. The cubic root of 620407252 is about 852.8885588372. Note that the first 3 decimals are identical.

The spelling of 620407252 in words is "six hundred twenty million, four hundred seven thousand, two hundred fifty-two".