620406250 has 28 divisors (see below), whose sum is σ = 1163305422. Its totient is φ = 248150000.

The previous prime is 620406247. The next prime is 620406253. The reversal of 620406250 is 52604026.

It is an interprime number because it is at equal distance from previous prime (620406247) and next prime (620406253).

It can be written as a sum of positive squares in 7 ways, for example, as 441462121 + 178944129 = 21011^2 + 13377^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (620406253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 21324 + ... + 41176.

Almost surely, 2^620406250 is an apocalyptic number.

620406250 is a deficient number, since it is larger than the sum of its proper divisors (542899172).

620406250 is an frugal number, since it uses more digits than its factorization.

620406250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19885 (or 19860 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 620406250 is about 24907.9555564081. The cubic root of 620406250 is about 852.8880996792. Note that the first 3 decimals are identical.

The spelling of 620406250 in words is "six hundred twenty million, four hundred six thousand, two hundred fifty".