620780 has 12 divisors (see below), whose sum is σ = 1303680. Its totient is φ = 248304.

The previous prime is 620777. The next prime is 620813. The reversal of 620780 is 87026.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15500 + ... + 15539.

It is an arithmetic number, because the mean of its divisors is an integer number (108640).

2⁶²⁰⁷⁸⁰ is an apocalyptic number.

It is an amenable number.

620780 is an abundant number, since it is smaller than the sum of its proper divisors (682900).

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

620780 is a wasteful number, since it uses less digits than its factorization.

620780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31048 (or 31046 counting only the distinct ones).

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

The square root of 620780 is about 787.8959322144. The cubic root of 620780 is about 85.3059333145.

The spelling of 620780 in words is "six hundred twenty thousand, seven hundred eighty".