620520440 has 32 divisors (see below), whose sum is σ = 1415303280. Its totient is φ = 244806912.

The previous prime is 620520437. The next prime is 620520491. The reversal of 620520440 is 44025026.

It is a super-3 number, since 3×620520440³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 103334 + ... + 109173.

Almost surely, 2^620520440 is an apocalyptic number.

It is an amenable number.

620520440 is an abundant number, since it is smaller than the sum of its proper divisors (794782840).

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

620520440 is a wasteful number, since it uses less digits than its factorization.

620520440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212591 (or 212587 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 620520440 is about 24910.2476904586. The cubic root of 620520440 is about 852.9404230923.

Adding to 620520440 its reverse (44025026), we get a palindrome (664545466).

The spelling of 620520440 in words is "six hundred twenty million, five hundred twenty thousand, four hundred forty".