620533538 has 4 divisors (see below), whose sum is σ = 930800310. Its totient is φ = 310266768.

The previous prime is 620533531. The next prime is 620533547. The reversal of 620533538 is 835335026.

620533538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 408161209 + 212372329 = 20203^2 + 14573^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 620533498 and 620533507.

It is not an unprimeable number, because it can be changed into a prime (620533531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155133383 + ... + 155133386.

Almost surely, 2^620533538 is an apocalyptic number.

620533538 is a deficient number, since it is larger than the sum of its proper divisors (310266772).

620533538 is a wasteful number, since it uses less digits than its factorization.

620533538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310266771.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 620533538 is about 24910.5105929204. The cubic root of 620533538 is about 852.9464243639.

The spelling of 620533538 in words is "six hundred twenty million, five hundred thirty-three thousand, five hundred thirty-eight".