620456 has 8 divisors (see below), whose sum is σ = 1163370. Its totient is φ = 310224.

The previous prime is 620441. The next prime is 620461. The reversal of 620456 is 654026.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 27556 = 770^2 + 166^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 38771 + ... + 38786.

2⁶²⁰⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

620456 is a deficient number, since it is larger than the sum of its proper divisors (542914).

620456 is a wasteful number, since it uses less digits than its factorization.

620456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77563 (or 77559 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 620456 is about 787.6902944686. The cubic root of 620456 is about 85.2910896596.

The spelling of 620456 in words is "six hundred twenty thousand, four hundred fifty-six".