620487 has 32 divisors (see below), whose sum is σ = 1088000. Its totient is φ = 349272.

The previous prime is 620467. The next prime is 620491. The reversal of 620487 is 784026.

It is not a de Polignac number, because 620487 - 2⁷ = 620359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

620487 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 620487.

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 620487.

It is not an unprimeable number, because it can be changed into a prime (620437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9228 + ... + 9294.

It is an arithmetic number, because the mean of its divisors is an integer number (34000).

2⁶²⁰⁴⁸⁷ is an apocalyptic number.

620487 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

620487 is a deficient number, since it is larger than the sum of its proper divisors (467513).

620487 is an equidigital number, since it uses as much as digits as its factorization.

620487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 620487 is about 787.7099720075. The cubic root of 620487 is about 85.2925101094.

The spelling of 620487 in words is "six hundred twenty thousand, four hundred eighty-seven".