620628531 has 8 divisors (see below), whose sum is σ = 832582080. Its totient is φ = 411213672.

The previous prime is 620628511. The next prime is 620628539. The reversal of 620628531 is 135826026.

620628531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620628531 - 2⁵ = 620628499 is a prime.

It is a super-2 number, since 2×620628531² = 770359546982435922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 620628492 and 620628501.

It is not an unprimeable number, because it can be changed into a prime (620628539) 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, 634101 + ... + 635078.

It is an arithmetic number, because the mean of its divisors is an integer number (104072760).

Almost surely, 2^620628531 is an apocalyptic number.

620628531 is a deficient number, since it is larger than the sum of its proper divisors (211953549).

620628531 is a wasteful number, since it uses less digits than its factorization.

620628531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269345.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 620628531 is about 24912.4172050807. The cubic root of 620628531 is about 852.9899459469.

The spelling of 620628531 in words is "six hundred twenty million, six hundred twenty-eight thousand, five hundred thirty-one".