620406426 has 16 divisors (see below), whose sum is σ = 1241317728. Its totient is φ = 206718000.

The previous prime is 620406421. The next prime is 620406427. The reversal of 620406426 is 624604026.

It is a junction number, because it is equal to n+sod(n) for n = 620406393 and 620406402.

It is not an unprimeable number, because it can be changed into a prime (620406421) 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, 4000 + ... + 35451.

It is an arithmetic number, because the mean of its divisors is an integer number (77582358).

Almost surely, 2^620406426 is an apocalyptic number.

620406426 is an abundant number, since it is smaller than the sum of its proper divisors (620911302).

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

620406426 is a wasteful number, since it uses less digits than its factorization.

620406426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42077.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 620406426 is about 24907.9590894156. The cubic root of 620406426 is about 852.8881803297. Note that the first 3 decimals are identical.

The spelling of 620406426 in words is "six hundred twenty million, four hundred six thousand, four hundred twenty-six".