620444026 has 4 divisors (see below), whose sum is σ = 930666042. Its totient is φ = 310222012.

The previous prime is 620443997. The next prime is 620444047.

620444026 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 559369801 + 61074225 = 23651^2 + 7815^2 .

It is a junction number, because it is equal to n+sod(n) for n = 620443985 and 620444003.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155111005 + ... + 155111008.

Almost surely, 2^620444026 is an apocalyptic number.

620444026 is a deficient number, since it is larger than the sum of its proper divisors (310222016).

620444026 is a wasteful number, since it uses less digits than its factorization.

620444026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310222015.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 620444026 is about 24908.7138568012. The cubic root of 620444026 is about 852.9054098674.

The spelling of 620444026 in words is "six hundred twenty million, four hundred forty-four thousand, twenty-six".