620870 has 16 divisors (see below), whose sum is σ = 1142208. Its totient is φ = 242880.

The previous prime is 620869. The next prime is 620887. The reversal of 620870 is 78026.

Added to its reverse (78026) it gives a square (698896 = 836²).

620870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620870.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (71388).

2⁶²⁰⁸⁷⁰ is an apocalyptic number.

620870 is a deficient number, since it is larger than the sum of its proper divisors (521338).

620870 is a wasteful number, since it uses less digits than its factorization.

620870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 620870 is about 787.9530442863. The cubic root of 620870 is about 85.3100556354.

Adding to 620870 its reverse (78026), we get a palindrome (698896).

The spelling of 620870 in words is "six hundred twenty thousand, eight hundred seventy".